diff --git a/Dockerfile b/Dockerfile
index 92646fb7..abcdfac3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.15.0a8-alpine@sha256:67a4b22b18852de8a9f668937641d2926e2dc9832b4a24ed29c9f5afb125251d
+FROM python:3.15.0b1-alpine@sha256:8fe37a98f64ee15fee985b1536cc005aef67847c31f435772250165307a68c2e
 
 ENTRYPOINT [ "/usr/local/bin/cfn-sync" ]