diff --git a/mainline/alpine-slim/Dockerfile b/mainline/alpine-slim/Dockerfile
index 9fe90d6f..af5f0cdf 100644
--- a/mainline/alpine-slim/Dockerfile
+++ b/mainline/alpine-slim/Dockerfile
@@ -3,7 +3,7 @@
 #
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
-FROM alpine:3.22
+FROM alpine:3.23
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
diff --git a/stable/alpine-slim/Dockerfile b/stable/alpine-slim/Dockerfile
index 29bf5ba2..5280f721 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:3.23
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
diff --git a/update.sh b/update.sh
index 50f9d2a1..ade51172 100755
--- a/update.sh
+++ b/update.sh
@@ -55,8 +55,8 @@ declare -A debian=(
 )
 
 declare -A alpine=(
-    [mainline]='3.22'
-    [stable]='3.21'
+    [mainline]='3.23'
+    [stable]='3.23'
 )
 
 # When we bump njs version in a stable release we don't move the tag in the