diff --git a/requirements.txt b/requirements.txt
index 79dd861..2b689c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 slack-bolt==1.28.0
-pytest
-ruff
+pytest==9.1.1
+ruff==0.15.19
 slack-cli-hooks==0.3.0
 openai==2.40.0
 anthropic==0.105.2