diff --git a/mainline/alpine-perl/Dockerfile b/mainline/alpine-perl/Dockerfile
index 1fdeb33e57b3fb0f3f0d5b1af19ce39cc3bfd8ce..631ce29be2b9bdee87bebf31a7b477de723eb70d 100644
--- a/mainline/alpine-perl/Dockerfile
+++ b/mainline/alpine-perl/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11
+FROM alpine:3.12
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
diff --git a/mainline/alpine/Dockerfile b/mainline/alpine/Dockerfile
index b2b59d86993a48cec05a02dee7cee3a72c1d9d15..6b185bffdb8ba0a38f7e89fc0cebf0077819486e 100644
--- a/mainline/alpine/Dockerfile
+++ b/mainline/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11
+FROM alpine:3.12
 
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"