Release Notes - LangChain v1 Migration

Breaking Changes

Python 3.10+ now required - LangChain v1 drops Python 3.9 support. Please upgrade to Python 3.10 or higher (Python 3.12 recommended).

Updates

LangChain v1 Compatibility

Upgraded to LangChain v1.0+ with updated import paths across the codebase:

• langchain.prompts → langchain_core.prompts
• langchain.text_splitter → langchain_text_splitters
• langchain.retrievers → langchain_classic.retrievers

Package Versions

• langchain>=1.0.0
• langchain-core>=1.0.0
• langchain-community>=0.4.0
• langchain-classic>=1.0.0 (new)

Simplified Dependencies

Reduced requirements.txt from 134 to 63 lines by removing transitive dependencies - now only lists packages directly used by the project.

📝 Migration Guide

# Install with Python 3.10+
python -m pip install -r requirements.txt
pip install gpt-researcher --upgrade

See the LangChain v1 migration guide for more details.

Fixes

• Updated all documentation examples with LangChain v1 imports
• Cleaned up backend requirements for production deployments

What's Changed in Release

• Fix: propagate MCP config to follow-up researchers; pass researcher i… by @sriramsowmithri9807 in #1529
• feat: Add proper multi-platform Docker build support by @TheSpaceGod in #1530
• fix: Update repository URL in CLI documentation by @Hnatekmar in #1533
• Fixed PubMed retreiver to correctly pull full texts from PMC. by @pgrosjean in #1545
• Langchain 1.0 Migration by @assafelovic in #1547

New Contributors

• @Hnatekmar made their first contribution in #1533
• @pgrosjean made their first contribution in #1545

Full Changelog: v.3.3.6...v.3.3.7