diff --git a/1.6/Dockerfile b/1.6/Dockerfile
index 68942f1..d3c388c 100644
--- a/1.6/Dockerfile
+++ b/1.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.22-fpm-buster@sha256:3e698733aebcd956a9cc6e769766d0db778480549ce2a158a1d10d27295689f6
+FROM php:7.4.10-fpm-buster@sha256:b4480566d894bd62fe6bd5438287fda079994aca0708b1b003ea2957055b763f
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.6.27
diff --git a/1.7/Dockerfile b/1.7/Dockerfile
index 1ea0389..09e3631 100644
--- a/1.7/Dockerfile
+++ b/1.7/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.22-fpm-buster@sha256:3e698733aebcd956a9cc6e769766d0db778480549ce2a158a1d10d27295689f6
+FROM php:7.4.10-fpm-buster@sha256:b4480566d894bd62fe6bd5438287fda079994aca0708b1b003ea2957055b763f
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.7.0-rc.16