diff --git a/backend/Dockerfile b/backend/Dockerfile
index 9d30cd3..e5e85f3 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21.2
+FROM alpine:3.21.1
 ARG PB_VERSION=0.21.3
 
 RUN addgroup -S app && adduser -S -G app app