# Drupal Upgrade ## Drupal Major Version Upgrades: Drupal 8/9/10 to 11/12 ### Future-Ready, Secure & Fully Supported Architecture #### Modernize Without Breaking Your Business Schedule Drupal Upgrade Assessment Summarize this page with AI [](https://chat.openai.com/?q=Summarize%20this%20page%20for%20me%3A%20https%3A%2F%2Fwww.pathtoproject.com%2Fservices%2Fdrupal-upgrade "Summarize this page with ChatGPT")[](https://claude.ai/new?q=Summarize%20this%20page%20for%20me%3A%20https%3A%2F%2Fwww.pathtoproject.com%2Fservices%2Fdrupal-upgrade "Summarize this page with Claude")[](https://www.google.com/search?udm=50&q=Summarize%20this%20page%20for%20me%3A%20https%3A%2F%2Fwww.pathtoproject.com%2Fservices%2Fdrupal-upgrade "Summarize this page with Gemini")[](https://x.com/i/grok?text=Summarize%20this%20page%20for%20me%3A%20https%3A%2F%2Fwww.pathtoproject.com%2Fservices%2Fdrupal-upgrade "Summarize this page with Grok")[](https://www.perplexity.ai/search/new?q=Summarize%20this%20page%20for%20me%3A%20https%3A%2F%2Fwww.pathtoproject.com%2Fservices%2Fdrupal-upgrade "Summarize this page with Perplexity") Drupal upgrade services are more than version changes — they are opportunities to modernize architecture, improve performance, clean up legacy code, and prepare your platform for the next 3–5 years. We help enterprises plan and execute Drupal major version upgrades, including Drupal 8 to Drupal 10 upgrade and Drupal 9 to Drupal 10 upgrade paths, as well as Drupal 10 to 11/12 upgrades. Our approach reduces technical debt, validates Drupal module upgrade compatibility, and strengthens long-term maintainability and security governance. #### Upgrade Scope ##### Drupal 8 → 11/12 ##### Drupal 9 → 11/12 ##### Drupal 10 → 11/12 ##### Legacy module refactoring ##### Composer modernization #### Risk Mitigation * Pre-upgrade audits * Dependency analysis * Staging & rollback strategy * Regression testing #### Architecture Improvements * Codebase cleanup * Performance tuning * Module consolidation * Security hardening #### Best Fit For * Enterprise Drupal platforms * Government & regulated sectors * Multisite ecosystems * Long-running Drupal projects ![Drupal Upgrade 1](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/service-drupal-upgrade--problem--outdated-core-under-structural-strain) ![Drupal Upgrade 2](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/service-drupal-upgrade--problem--dependency-entanglement-and-custom-module-lock-in) ![Drupal Upgrade 3](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/service-drupal-upgrade--problem--broken-integration-risk-during-upgrade) ![Drupal Upgrade 4](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/service-drupal-upgrade--problem--deployment-and-workflow-disruption) ![Drupal Upgrade 5](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/service-drupal-upgrade--problem--performance-and-security-regression-risk) ## Upgrading Drupal Is Often Risky & Disruptive Many enterprise Drupal platforms stay on older core versions because the upgrade surface area is larger than it appears: contributed modules lag behind, custom code relies on deprecated APIs, and dependency trees become tightly coupled over years of incremental change. As Drupal 9 end of life approaches (or has passed for some environments), teams face increasing pressure to move quickly, often without a clear view of what will break or how much refactoring is required. The cost of a Drupal upgrade becomes harder to predict when ownership is fragmented across vendors, internal teams, and legacy build pipelines. The risks of not upgrading Drupal compound over time. Unsupported core and dependencies increase exposure to vulnerabilities and make Drupal security upgrades harder to apply safely. Integration points (SSO, search, analytics, CRM, DAM, and custom APIs) can fail during a Drupal major version upgrade if configuration drift and environment inconsistencies are not controlled. Editorial workflows may be disrupted by theme and UI changes, while performance can regress when caching, database queries, or infrastructure assumptions no longer match current best practices. Operationally, delayed upgrades create delivery bottlenecks, higher maintenance overhead, and architectural inconsistency across multisite estates. ## Our Structured Drupal Upgrade Approach ### Technical Audit Full module, dependency, and custom code analysis before starting. ### Upgrade Roadmap Clear scope, risk matrix, and phased delivery plan. ### Environment Setup Parallel staging with CI/CD and rollback capability. ### Code Modernization Refactor deprecated APIs and remove legacy patterns. ### Testing & QA Automated and manual regression testing. ### Post-Upgrade Hardening Security review, performance tuning, and monitoring setup. ## Drupal Upgrade Capabilities (Core, Security & Module Upgrades) Our Drupal upgrade capabilities support controlled Drupal major version upgrade and Drupal minor version updates for enterprise platforms. We refactor deprecated code, standardize dependency management with Composer, and run a structured Drupal module upgrade and compatibility review across contributed and custom components. The approach strengthens maintainability, improves performance baselines, and supports consistent Drupal security upgrade practices across environments. ![Feature: Deprecated Code Refactoring](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--deprecated-code-refactoring) 1 ### Deprecated Code Refactoring We analyze legacy custom modules and themes to identify deprecated APIs, outdated patterns, and technical debt. Code is refactored to align with modern Drupal standards, improving maintainability, readability, and long-term upgrade compatibility while reducing future upgrade risks. ![Feature: Composer-Based Architecture](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--composer-based-architecture) 2 ### Composer-Based Architecture We transition your project to a proper Composer-based workflow, ensuring structured dependency management, predictable builds, and clean version control. This foundation enables smoother upgrades, safer deployments, and improved alignment with modern Drupal best practices. ![Feature: Module Compatibility Review](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--module-compatibility-review) 3 ### Module Compatibility Review Contributed and custom modules are evaluated for compatibility with the target Drupal version. Unsupported or deprecated modules are replaced with stable alternatives, upgraded where possible, or reimplemented to ensure platform stability and long-term sustainability. ![Feature: Theme Modernization](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--theme-modernization) 4 ### Theme Modernization Twig templates, frontend assets, and theming layers are updated to modern Drupal standards. We improve structure, accessibility, and performance while maintaining design integrity and ensuring compatibility with the latest frontend tooling and rendering practices. ![Feature: Performance Improvements](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--performance-improvements) 5 ### Performance Improvements During the upgrade process, we optimize caching strategies, database queries, and infrastructure alignment. Performance bottlenecks are identified and resolved, ensuring faster load times, improved Lighthouse scores, and a more responsive user experience. ![Feature: Security Alignment](https://res.cloudinary.com/dywr7uhyq/image/upload/w_580,f_avif,q_auto:good/v1/service-drupal-upgrade--core-features--security-alignment) 6 ### Security Alignment The upgraded platform is aligned with supported Drupal core versions and security best practices. We ensure that security updates, module compatibility, and dependency management are fully compliant with current Drupal standards, reducing exposure to vulnerabilities and future risks. What We Deliver * Drupal 5/6/7/8/9/10/11/12 platform review * Multisite & enterprise architecture assessment * Cloud & containerized infrastructure review * Performance & load diagnostics * Security hardening evaluation * Headless & API architecture review Who This Is For * Organizations running Drupal 7, 8, 9 or 10 * Enterprises with custom modules * Government & regulated sectors * Platforms requiring long-term stability * Multisite Drupal ecosystems Technology Stack * Drupal 7/8/9/10/11/12 * Composer * Drush * PHP 8.4+ * MySQL / MariaDB / PostgreSQL * CI/CD (GitHub, Bitbucket, GitLab) * Cloud Infrastructure (AWS, DO, Acquia) ## Delivery Process Delivery follows a clear engineering sequence: discovery and dependency audit, roadmap and environment preparation, upgrade execution, refactoring, and validation through QA and release controls. We plan for Drupal major version upgrade and ongoing Drupal minor version updates with repeatable build and deployment practices, so changes can be introduced with minimal operational disruption. ![Delivery card for Discovery & Audit](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--discovery-and-audit)\[01\] ### Discovery & Audit Comprehensive technical assessment of your current Drupal platform, including core version, contributed modules, custom code, integrations, hosting architecture, and security posture. We evaluate upgrade complexity, identify deprecated APIs, detect risks, and define a structured upgrade roadmap with clear milestones and effort estimates. ![Delivery card for Upgrade Execution](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--upgrade-execution)\[02\] ### Upgrade Execution Structured core and module upgrades performed in isolated development and staging environments. We follow best practices for dependency management, configuration synchronization, and database updates to ensure stability, compatibility, and minimal business disruption. ![Delivery card for Refactoring Phase](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--refactoring-phase)\[03\] ### Refactoring Phase Modernization of custom modules, themes, and legacy integrations to align with current Drupal standards. Deprecated functions are replaced, code is optimized for maintainability, and architecture is improved to support future scalability and long-term sustainability. ![Delivery card for QA & Regression Testing](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--qa-and-regression-testing)\[04\] ### QA & Regression Testing Full validation of functionality, integrations, performance, and security across environments. Automated regression testing, manual validation, and cross-browser checks ensure that business workflows, user journeys, and content operations remain fully intact after upgrade. ![Delivery card for Deployment & Monitoring](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--deployment-and-monitoring)\[05\] ### Deployment & Monitoring Carefully orchestrated production release with rollback strategies, zero-downtime techniques, and deployment automation. Real-time monitoring and log analysis confirm system stability and allow rapid response if unexpected behavior occurs. ![Delivery card for Post-Launch Support](https://res.cloudinary.com/dywr7uhyq/image/upload/w_540,f_avif,q_auto:good/v1/service-drupal-upgrade--delivery--post-launch-support)\[06\] ### Post-Launch Support Stabilization period after launch including performance monitoring, fine-tuning, patch verification, and proactive issue resolution. We ensure your upgraded Drupal platform operates reliably and is fully prepared for future enhancements. ## Business Outcomes Upgrading to supported Drupal versions significantly reduces security exposure and compliance risk. A modernized, Composer-based architecture lowers long-term maintenance costs by simplifying dependency management and future updates. Performance optimizations introduced during the upgrade improve user experience and operational efficiency. Standardized code and deployment practices reduce upgrade friction in subsequent release cycles. For executive stakeholders, this provides predictable modernization costs and a stable foundation aligned with evolving technical and regulatory requirements. ### Reduced Security Risk Transitioning to supported Drupal core versions restores full security coverage and reduces vulnerability exposure. ### Lower Maintenance Costs Cleaner architecture and structured dependency management decrease long-term operational and upgrade overhead. ### Improved Performance Optimized caching, modern rendering practices, and refined infrastructure improve responsiveness and stability. ### Long-Term Stability Standardized architecture ensures smoother future upgrades and reduces disruption during release cycles. ### Compliance Alignment Modern PHP versions, supported modules, and updated security practices align with enterprise compliance standards. ### Stronger Development Velocity Modern tooling and clean codebases enable engineering teams to deliver enhancements more efficiently and with lower risk. ## Related Services Drupal upgrades are often part of a broader platform modernization process that strengthens architecture, infrastructure, and operational practices. These related services help organizations validate technical foundations, improve deployment reliability, and maintain long-term platform stability after the upgrade. Together they support a sustainable lifecycle for evolving enterprise Drupal platforms. [ ### Drupal Platform Audit Enterprise Drupal Technical Assessment & Drupal Health Check Learn More ](/services/drupal-platform-audit)[ ### Drupal Platform Modernization Enterprise Drupal upgrade strategy for upgradeable delivery Learn More ](/services/drupal-platform-modernization)[ ### Drupal Version Upgrade Drupal major version upgrade services with dependency and code remediation Learn More ](/services/drupal-version-upgrade)[ ### Drupal Migration Drupal content migration engineering for data, content, and platform change Learn More ](/services/drupal-migration)[ ### Drupal Development Custom modules, extensions, and feature engineering Learn More ](/services/drupal-development)[ ### Drupal Legacy System Modernization Enterprise CMS modernization services for legacy Drupal estates Learn More ](/services/drupal-legacy-system-modernization)[ ### Drupal Platform Strategy Roadmaps, governance model design, and platform decision frameworks Learn More ](/services/drupal-platform-strategy)[ ### Enterprise Drupal Architecture Designing Scalable Digital Foundations Learn More ](/services/drupal-architecture)[ ### Drupal Content Architecture Drupal content architecture design and editorial operating design Learn More ](/services/drupal-content-architecture) ## Frequently Asked Questions These FAQs cover common questions about Drupal major version upgrade planning, Drupal 9 end of life upgrade timelines, risks of not upgrading Drupal, and how teams handle Drupal custom module upgrade work, testing, and release controls to upgrade Drupal without downtime. When should we plan a Drupal core upgrade? Drupal upgrades should be planned well before end-of-life dates for your current core version. Waiting until security support ends increases operational risk and compresses timelines under pressure. Proactive upgrades allow organizations to evaluate module compatibility, refactor deprecated APIs, and modernize infrastructure in a controlled manner. Strategic timing also enables architecture cleanup and performance improvements rather than executing a rushed version transition driven by compliance urgency. Is upgrading Drupal the same as a full migration? Not necessarily. Upgrades from Drupal 8, 9, or 10 to newer supported versions typically follow a modernization pathway rather than a full rebuild. However, heavy customizations or deprecated modules may introduce migration-like complexity. A technical audit determines whether your platform qualifies for a structured upgrade or requires partial re-architecture. The goal is to minimize disruption while ensuring long-term compatibility and maintainability. What are the primary risks associated with Drupal upgrades? The main risks include deprecated custom code, unsupported contributed modules, integration breakage, configuration drift, and deployment instability. Platforms with legacy patterns often require refactoring before upgrading safely. Without structured dependency analysis and regression testing, upgrades may impact editorial workflows, API integrations, or frontend rendering. Risk mitigation requires staging environments, automated testing, and clearly defined rollback procedures. Will the Drupal upgrade process cause downtime? Downtime can be avoided through parallel staging environments and controlled deployment strategies. Upgrades are executed and validated outside production before final release. Zero-downtime deployment techniques, configuration synchronization, and rollback planning reduce operational risk. When executed correctly, production impact is limited to a scheduled release window with minimal or no visible disruption to users. How are custom modules handled during a Drupal upgrade? Custom modules are reviewed for deprecated APIs, coding standards compliance, and architectural alignment with the target Drupal version. Refactoring is performed where required to remove legacy patterns. In some cases, functionality is consolidated or replaced with modern alternatives. The objective is not only compatibility but improved maintainability and reduced technical debt moving forward. Why is Composer-based architecture important during upgrades? Composer enables structured dependency management, predictable builds, and version control alignment. Without proper Composer integration, upgrades become inconsistent and difficult to reproduce across environments. Transitioning to a clean Composer workflow improves deployment reliability and simplifies future upgrades. It also ensures alignment with modern Drupal development standards and CI/CD practices. Can a Drupal upgrade improve performance? Yes. Newer Drupal versions introduce performance improvements, modern PHP compatibility, and enhanced caching capabilities. During the upgrade process, performance bottlenecks can also be identified and addressed. Refactoring deprecated code, optimizing queries, and modernizing frontend layers often lead to measurable improvements in response times and scalability. Performance enhancement is frequently integrated into the upgrade roadmap. How is functionality validated after upgrading Drupal? Validation includes automated regression testing, manual QA workflows, integration verification, and performance benchmarking. Critical business journeys and editorial processes are tested across environments. Security configuration, caching behavior, and deployment pipelines are also reviewed to ensure stability. Comprehensive testing ensures that the upgrade strengthens the platform rather than introducing hidden regressions. Should we treat a Drupal upgrade as a modernization opportunity? Yes. An upgrade provides a natural checkpoint to evaluate architecture, remove unused modules, improve code quality, and strengthen DevOps maturity. Rather than executing a minimal compatibility adjustment, many organizations use upgrades to clean technical debt and prepare for future growth. A structured modernization layer reduces future upgrade friction and improves long-term platform health. What is the first step in initiating a Drupal upgrade project? The process begins with a technical audit covering core version, contributed modules, custom code, integrations, and infrastructure setup. This assessment defines upgrade complexity and identifies risk areas. Based on the findings, a phased upgrade roadmap is created, including refactoring scope, testing strategy, and deployment planning. This structured preparation ensures a controlled, predictable upgrade aligned with business priorities. ## Drupal Platform Modernization and Upgrade Case Studies These case studies showcase comprehensive Drupal platform upgrades and modernizations that align closely with Drupal upgrade consulting. They highlight real-world delivery of major version migrations, architecture modernization, performance improvements, and security enhancements, demonstrating measurable outcomes in maintainability and scalability. \[01\] ### [Bayer Radiología LATAMSecure Healthcare Drupal Collaboration Platform](/projects/bayer-radiologia-latam "Bayer Radiología LATAM") [![Project: Bayer Radiología LATAM](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/project-bayer--challenge--01)](/projects/bayer-radiologia-latam "Bayer Radiología LATAM") [Learn More](/projects/bayer-radiologia-latam "Learn More: Bayer Radiología LATAM") Industry: Healthcare / Medical Imaging Business Need: An advanced healthcare digital platform for LATAM was required to facilitate collaboration among radiology HCPs, distribute company knowledge, refine treatment methods, and streamline workflows. The solution needed secure medical website role-based access restrictions based on user role (HCP / non-HCP) and geographic region. Challenges & Solution: * Multi-level filtering for precise content discovery. - Role-based access control to support different professional needs. - Personalized HCP offices for tailored user experiences. - A structured approach to managing diverse stakeholder expectations. Outcome: The platform enhanced collaboration, streamlined workflows, and empowered radiology professionals with advanced tools to gain insights and optimize patient care. \[02\] ### [Copernicus Marine ServiceCopernicus Marine Service Drupal DXP case study — Marine data portal modernization](/projects/copernicus-marine-service-environmental-science-marine-data "Copernicus Marine Service") [![Project: Copernicus Marine Service](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/project-copernicus--challenge--01)](/projects/copernicus-marine-service-environmental-science-marine-data "Copernicus Marine Service") [Learn More](/projects/copernicus-marine-service-environmental-science-marine-data "Learn More: Copernicus Marine Service") Industry: Environmental Science / Marine Data Business Need: The existing marine data portal relied on three unaligned WordPress installations and embedded PHP code, creating inefficiencies and risks in content management and usability. Challenges & Solution: * Migrated three legacy WordPress sites and a Drupal 7 site to a unified Drupal-based platform. - Replaced risky PHP fragments with configurable Drupal components. - Improved information architecture and user experience for data exploration. - Implemented integrations: Solr search, SSO (SAML), and enhanced analytics tracking. Outcome: The new Drupal DXP streamlined content operations and improved accessibility, offering scientists and businesses a more efficient gateway to marine data services. \[03\] ### [United Nations Convention to Combat Desertification (UNCCD)United Nations website migration to a unified Drupal DXP](/projects/unccd-united-nations-convention-to-combat-desertification "United Nations Convention to Combat Desertification (UNCCD)") [![Project: United Nations Convention to Combat Desertification (UNCCD)](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/project-unccd--challenge--01)](/projects/unccd-united-nations-convention-to-combat-desertification "United Nations Convention to Combat Desertification (UNCCD)") [Learn More](/projects/unccd-united-nations-convention-to-combat-desertification "Learn More: United Nations Convention to Combat Desertification (UNCCD)") Industry: International Organization / Environmental Policy Business Need: UNCCD operated four separate websites (two WordPress, two Drupal), leading to inconsistencies in design, content management, and user experience. A unified, scalable solution was needed to support a large-scale CMS migration project and improve efficiency and usability. Challenges & Solution: * Migrating all sites into a single, structured Drupal-based platform (government website Drupal DXP approach). - Implementing Storybook for a design system and consistency, reducing content development costs by 30–40%. - Managing input from 27 stakeholders while maintaining backend stability. - Integrating behavioral tracking, A/B testing, and optimizing performance for strong Google Lighthouse scores. - Converting Adobe InDesign assets into a fully functional web experience. Outcome: The modernization effort resulted in a cohesive, user-friendly, and scalable website, improving content management efficiency and long-term digital sustainability. \[04\] ### [VeoliaEnterprise Drupal Multisite Modernization (Acquia Site Factory, 200+ Sites)](/projects/veolia-environmental-services-sustainability "Veolia") [![Project: Veolia](https://res.cloudinary.com/dywr7uhyq/image/upload/w_644,f_avif,q_auto:good/v1/project-veolia--challenge--01)](/projects/veolia-environmental-services-sustainability "Veolia") [Learn More](/projects/veolia-environmental-services-sustainability "Learn More: Veolia") Industry: Environmental Services / Sustainability Business Need: With Drupal 7 reaching end-of-life, Veolia needed a Drupal 7 to Drupal 10 enterprise migration for its Acquia Site Factory multisite platform—preserving region-specific content and multilingual capabilities across more than 200 sites. Challenges & Solution: * Supported Acquia Site Factory multisite architecture at enterprise scale (200+ sites). - Ported the installation profile from Drupal 7 to Drupal 10 while ensuring platform stability. - Delivered advanced configuration management strategy for safe incremental rollout across released sites. - Improved page loading speed by refactoring data fetching and caching strategies. Outcome: The platform was modernized into a stable, scalable multisite foundation with improved performance, maintainability, and long-term upgrade readiness. ## What Clients Say It was my pleasure working with Oleksiy (PathToProject) on a new Drupal website. He is a true full-stack developer—the ideal mix of DevOps expertise, deep front-end knowledge, and the structured thinking of a senior back-end developer. He is well-organized and never lets anything slip. Oleksiy understands what needs to be done before being asked and can manage a project independently with minimal involvement from clients, product managers, or business analysts. One of the best consultants I’ve worked with so far. ![Photo: Andrei Melis](https://res.cloudinary.com/dywr7uhyq/image/upload/w_100,f_avif,q_auto:good/v1/testimonial-andrei-melis) #### Andrei Melis ##### Technical Lead at Eau de Web Oleksiy (PathToProject) and I worked together on a Digital Transformation project for Bayer LATAM Radiología. Oly was the Drupal developer, and I was the business lead. His professionalism, technical expertise, and ability to deliver functional improvements were some of the key attributes he brought to the project. I also want to highlight his collaboration and flexibility—throughout the entire journey, Oleksiy exceeded my expectations. It’s great when you can partner with vendors you trust, and who go the extra mile. ![Photo: Axel Gleizerman Copello](https://res.cloudinary.com/dywr7uhyq/image/upload/w_100,f_avif,q_auto:good/v1/testimonial-axel-gleizerman-copello) #### Axel Gleizerman Copello ##### Building in the MedTech Space | Antler Oleksiy (PathToProject) is demanding and responsive. Comfortable with an Agile approach and strong technical skills, I appreciate the way he challenges stories and features to clarify specifications before and during sprints. ![Photo: Olivier Ritlewski](https://res.cloudinary.com/dywr7uhyq/image/upload/w_100,f_avif,q_auto:good/v1/testimonial-olivier-ritlewski) #### Olivier Ritlewski ##### Ingénieur Logiciel chez EPAM Systems ## Further reading on Drupal upgrade planning and platform modernization These articles expand on the planning, refactoring, and governance work that makes Drupal upgrades successful beyond a simple version change. They cover enterprise migration planning, deprecated code and compatibility strategy, multisite standardization, and dependency mapping that often shape upgrade scope, risk, and long-term maintainability. [ ![Drupal 11 Migration Planning for Enterprise Teams](https://res.cloudinary.com/dywr7uhyq/image/upload/c_fill,w_1440,h_1080,g_auto/f_auto/q_auto/v1/blog-20260304-drupal-11-migration-planning-for-enterprise-teams--cover?_a=BAVMn6ID0) ### Drupal 11 Migration Planning for Enterprise Teams Mar 4, 2026 ](/blog/20260304-drupal-11-migration-planning-for-enterprise-teams) [ ![Drupal 8 vs Drupal 9](https://res.cloudinary.com/dywr7uhyq/image/upload/c_fill,w_1440,h_1080,g_auto/f_auto/q_auto/v1/blog--20201107--drupal-8-vs-drupal-9?_a=BAVMn6ID0) ### Drupal 8 vs Drupal 9 Nov 17, 2020 ](/blog/20201015-drupal-8-vs-drupal-9) [ ![How to Standardize a Drupal Multisite Platform Without Freezing Local Delivery](https://res.cloudinary.com/dywr7uhyq/image/upload/c_fill,w_1440,h_1080,g_auto/f_auto/q_auto/v1/blog-20250722-drupal-multisite-standardization-without-blocking-local-teams--cover?_a=BAVMn6ID0) ### How to Standardize a Drupal Multisite Platform Without Freezing Local Delivery Jul 22, 2025 ](/blog/20250722-drupal-multisite-standardization-without-blocking-local-teams) [ ![AEM to Drupal Migration: The Dependency Mapping Work Most Teams Underestimate](https://res.cloudinary.com/dywr7uhyq/image/upload/c_fill,w_1440,h_1080,g_auto/f_auto/q_auto/v1/blog-20230914-aem-to-drupal-migration-dependency-mapping-before-cutover--cover?_a=BAVMn6ID0) ### AEM to Drupal Migration: The Dependency Mapping Work Most Teams Underestimate Sep 14, 2023 ](/blog/20230914-aem-to-drupal-migration-dependency-mapping-before-cutover) ## Ready to Upgrade Your Drupal Platform? Let’s assess your current Drupal version and create a structured upgrade plan that minimizes risk and prepares your platform for the future. Schedule Drupal Upgrade Assessment ![Oleksiy (Oly) Kalinichenko](https://res.cloudinary.com/dywr7uhyq/image/upload/c_fill,w_200,h_200,g_center,f_avif,q_auto:good/v1/contant--oly) ### Oleksiy (Oly) Kalinichenko #### CTO at PathToProject [](https://www.linkedin.com/in/oleksiy-kalinichenko/ "LinkedIn: Oleksiy (Oly) Kalinichenko") ### Do you want to start a project? Send