diff --git a/1.6/Dockerfile b/1.6/Dockerfile
index 8fb1554..787847e 100644
--- a/1.6/Dockerfile
+++ b/1.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.24-fpm-buster@sha256:44ece7184aa2c7ccc772cef6d919fbf7f318fd4313e53c7ef71816366152cba4
+FROM php:7.4.12-fpm-buster@sha256:ed5f18ce68f67f7fdff07a75a61c68c90a7c93c1568021b003dd41059358ad5e
 
 # 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 50dd209..2e2f0a0 100644
--- a/1.7/Dockerfile
+++ b/1.7/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.24-fpm-buster@sha256:44ece7184aa2c7ccc772cef6d919fbf7f318fd4313e53c7ef71816366152cba4
+FROM php:7.4.12-fpm-buster@sha256:ed5f18ce68f67f7fdff07a75a61c68c90a7c93c1568021b003dd41059358ad5e
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.7.0-rc.17