diff --git a/pyproject.toml b/pyproject.toml
index 631741e..90382a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ dependencies = [
   "redis",
   "requests",
   "slack-bolt",
-  "openai",
+  "openai==1.20.0",
   "pyyaml",
 ]