diff --git a/math/proof-assistant/requirements.txt b/math/proof-assistant/requirements.txt
index f37d933..6e712b2 100644
--- a/math/proof-assistant/requirements.txt
+++ b/math/proof-assistant/requirements.txt
@@ -1,7 +1,7 @@
 altair==5.5.0
 attrs==25.3.0
 blinker==1.9.0
-cachetools==6.2.0
+cachetools==6.2.6
 certifi==2025.8.3
 charset-normalizer==3.4.9
 click==8.1.8