diff --git a/CHANGELOG.md b/CHANGELOG.md
index 939046b..938bdb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added shareable preview links limitation to known issues
 - Documented that python-substack library hasn't been updated in 2+ years
 
+### Infrastructure
+- Fixed CI/CD pipeline - all tests now pass in GitHub Actions
+- Added unit and integration tests to version control (fixed .gitignore)
+- Fixed code formatting and linting issues across entire codebase
+
 ### Known Issues
 - Image rendering shows markdown syntax instead of rendered images
 - Subscriber count may show 0 even with subscribers (API limitation)  
diff --git a/README.md b/README.md
index 7c7d667..a01029f 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 
 ## 📋 Requirements
 
-- Python 3.9 or higher
+- Python 3.10 or higher
 - Substack account credentials:
     - Email and password (recommended)
     - OR session token and user ID