diff --git a/1.6/Dockerfile b/1.6/Dockerfile
index 6642a69..85c8c6a 100644
--- a/1.6/Dockerfile
+++ b/1.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.23-fpm-buster@sha256:2adca6ae3a0f650e7ec96198162ac07529401d4dd9f46b925f06c59fd5be5b9a
+FROM php:7.3.23-fpm-buster@sha256:78787ee54f248c1dfa0c6a22256e27846eadf898ca526714513268e308b7250c
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.6.28
diff --git a/1.7/Dockerfile b/1.7/Dockerfile
index aab0e49..b730639 100644
--- a/1.7/Dockerfile
+++ b/1.7/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.23-fpm-buster@sha256:2adca6ae3a0f650e7ec96198162ac07529401d4dd9f46b925f06c59fd5be5b9a
+FROM php:7.3.23-fpm-buster@sha256:78787ee54f248c1dfa0c6a22256e27846eadf898ca526714513268e308b7250c
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.7.0-rc.17