diff --git a/requirements.txt b/requirements.txt
index cb76dbd..93d59ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@
 diagrams>=0.24.0
 
 # Image processing (required by diagrams for PNG generation)
-matplotlib>=3.10.0
+matplotlib>=3.10.9
 pillow>=11.0.0
 
 # Infrastructure validation and security scanning