diff --git a/stable/alpine-slim/Dockerfile b/stable/alpine-slim/Dockerfile
index 29bf5ba2..c1443ce9 100644
--- a/stable/alpine-slim/Dockerfile
+++ b/stable/alpine-slim/Dockerfile
@@ -3,7 +3,7 @@
 #
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
-FROM alpine:3.21
+FROM alpine:3.22
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
diff --git a/update.sh b/update.sh
index e85d193f..0cab35a9 100755
--- a/update.sh
+++ b/update.sh
@@ -56,7 +56,7 @@ declare -A debian=(
 
 declare -A alpine=(
     [mainline]='3.22'
-    [stable]='3.21'
+    [stable]='3.22'
 )
 
 # When we bump njs version in a stable release we don't move the tag in the