diff --git a/1.7/Dockerfile b/1.7/Dockerfile
index 396c75c..4f84f62 100644
--- a/1.7/Dockerfile
+++ b/1.7/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.4.24-fpm-buster@sha256:5a1519720302cd11db2ce41bbd808fe7fa723c329b9ed1488650c088d5393a66
+FROM php:7.4.24-fpm-bullseye@sha256:31ff9d774792fd722f90d528e9ac099e50434dea0739f20cb56cfd87d79c5f93
 
 SHELL [ "/bin/bash", "-exo", "pipefail", "-c" ]
 
diff --git a/1.7/Dockerfile.prod b/1.7/Dockerfile.prod
index 28b49dc..88b37c3 100644
--- a/1.7/Dockerfile.prod
+++ b/1.7/Dockerfile.prod
@@ -1,4 +1,4 @@
-FROM php:7.4.24-fpm-buster@sha256:5a1519720302cd11db2ce41bbd808fe7fa723c329b9ed1488650c088d5393a66
+FROM php:7.4.24-fpm-bullseye@sha256:31ff9d774792fd722f90d528e9ac099e50434dea0739f20cb56cfd87d79c5f93
 
 SHELL [ "/bin/bash", "-exo", "pipefail", "-c" ]