diff --git a/requirements-lock.txt b/requirements-lock.txt
index 1bd1e5f..0fe5ccf 100644
--- a/requirements-lock.txt
+++ b/requirements-lock.txt
@@ -4,7 +4,7 @@
 # Core experiment dependencies (no GPU required):
 # NOTE: numpy==2.4.5 is required for torch 2.3.1 ABI compatibility (numpy 2.x breaks torch).
 numpy==2.4.5
-matplotlib==3.9.2
+matplotlib==3.10.9
 scipy==1.14.1
 pytest==8.3.5
 reportlab==4.5.1