diff --git a/20/apache/Dockerfile b/20/apache/Dockerfile
index 9c0e0fe8..7e8f9af7 100644
--- a/20/apache/Dockerfile
+++ b/20/apache/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-apache-buster
+FROM php:7.4-apache-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/20/fpm/Dockerfile b/20/fpm/Dockerfile
index 7dc76d16..19ca51d6 100644
--- a/20/fpm/Dockerfile
+++ b/20/fpm/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-fpm-buster
+FROM php:7.4-fpm-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/21/apache/Dockerfile b/21/apache/Dockerfile
index cf83e47a..a476ed4b 100644
--- a/21/apache/Dockerfile
+++ b/21/apache/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-apache-buster
+FROM php:7.4-apache-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/21/fpm/Dockerfile b/21/fpm/Dockerfile
index 83498f83..2c3cc0a4 100644
--- a/21/fpm/Dockerfile
+++ b/21/fpm/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-fpm-buster
+FROM php:7.4-fpm-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/22/apache/Dockerfile b/22/apache/Dockerfile
index 8420ea3c..3aa15715 100644
--- a/22/apache/Dockerfile
+++ b/22/apache/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-apache-buster
+FROM php:7.4-apache-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \
diff --git a/22/fpm/Dockerfile b/22/fpm/Dockerfile
index b5fc0448..a49b75cf 100644
--- a/22/fpm/Dockerfile
+++ b/22/fpm/Dockerfile
@@ -1,5 +1,5 @@
 # DO NOT EDIT: created by update.sh from Dockerfile-debian.template
-FROM php:7.4-fpm-buster
+FROM php:7.4-fpm-bullseye
 
 # entrypoint.sh and cron.sh dependencies
 RUN set -ex; \