diff --git a/1.6/Dockerfile b/1.6/Dockerfile
index 398347a..c7379fa 100644
--- a/1.6/Dockerfile
+++ b/1.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.19-fpm-buster@sha256:998f3dc664d570103af88044215b347bff77c43de95c52be1ebae0a0cfd08543
+FROM php:7.3.20-fpm-buster@sha256:80c7f7607d6117cb9625ca5aeea3ec21f5e576a922b2696c24a1835a44ef4643
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.6.26
diff --git a/1.7/Dockerfile b/1.7/Dockerfile
index f2f4f07..416a97c 100644
--- a/1.7/Dockerfile
+++ b/1.7/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.19-fpm-buster@sha256:998f3dc664d570103af88044215b347bff77c43de95c52be1ebae0a0cfd08543
+FROM php:7.3.20-fpm-buster@sha256:80c7f7607d6117cb9625ca5aeea3ec21f5e576a922b2696c24a1835a44ef4643
 
 # renovate: datasource=github-tags depName=getgrav/grav versioning=semver
 ENV GRAV_VERSION 1.7.0-rc.13