diff --git a/18.0/fpm-alpine/Dockerfile b/18.0/fpm-alpine/Dockerfile
index 7bea94f0..81273044 100644
--- a/18.0/fpm-alpine/Dockerfile
+++ b/18.0/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.3-fpm-alpine3.12
+FROM php:7.3-fpm-alpine3.13
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/19.0/fpm-alpine/Dockerfile b/19.0/fpm-alpine/Dockerfile
index 206e9160..d76b6753 100644
--- a/19.0/fpm-alpine/Dockerfile
+++ b/19.0/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.4-fpm-alpine3.12
+FROM php:7.4-fpm-alpine3.13
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/20.0-rc/fpm-alpine/Dockerfile b/20.0-rc/fpm-alpine/Dockerfile
index 52f27d3f..c38e8436 100644
--- a/20.0-rc/fpm-alpine/Dockerfile
+++ b/20.0-rc/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.4-fpm-alpine3.12
+FROM php:7.4-fpm-alpine3.13
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/20.0/fpm-alpine/Dockerfile b/20.0/fpm-alpine/Dockerfile
index 9b0c9931..d884c82f 100644
--- a/20.0/fpm-alpine/Dockerfile
+++ b/20.0/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.4-fpm-alpine3.12
+FROM php:7.4-fpm-alpine3.13
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/21.0-beta/fpm-alpine/Dockerfile b/21.0-beta/fpm-alpine/Dockerfile
index 4fec66ac..318467fc 100644
--- a/21.0-beta/fpm-alpine/Dockerfile
+++ b/21.0-beta/fpm-alpine/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-alpine.template
-FROM php:7.4-fpm-alpine3.12
+FROM php:7.4-fpm-alpine3.13
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \