diff --git a/replay-handler-cloudformation.yaml b/replay-handler-cloudformation.yaml
index 48e3240..d8f27c3 100644
--- a/replay-handler-cloudformation.yaml
+++ b/replay-handler-cloudformation.yaml
@@ -343,7 +343,7 @@ Resources:
       Handler: index.handler
       MemorySize: 128
       Role: !GetAtt LambdaExecutionRole.Arn
-      Runtime: "python3.12"
+      Runtime: "python3.13"
       Timeout: 30
       Code:
         ZipFile: |