diff --git a/requirements-freqai.txt b/requirements-freqai.txt
index e0cd09582..1f920d2c7 100644
--- a/requirements-freqai.txt
+++ b/requirements-freqai.txt
@@ -6,6 +6,7 @@
 scikit-learn==1.5.1
 joblib==1.4.2
 catboost==1.2.5; 'arm' not in platform_machine
+# Pin Matplotlib - it's depended on by catboost
 # Temporary downgrade of matplotlib due to https://github.com/matplotlib/matplotlib/issues/28551
 matplotlib==3.9.0
 lightgbm==4.5.0