diff --git a/1.6/Dockerfile b/1.6/Dockerfile
index 3bb3c21..d6d645d 100644
--- a/1.6/Dockerfile
+++ b/1.6/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:7.3.29-fpm-buster@sha256:9fa6acffa9b016b8090e9f20b225fc2d83183b58c49d0290038c7b0b07ecdea8
+FROM php:7.4.21-fpm-buster@sha256:a6747b4ee9b95efbb87dc88104be54c44ab63f086eb8c0aa3c19980118ea6040
 
 SHELL [ "/bin/bash", "-exo", "pipefail", "-c" ]
 
diff --git a/1.6/Dockerfile.prod b/1.6/Dockerfile.prod
index 74b68da..6e96b0b 100644
--- a/1.6/Dockerfile.prod
+++ b/1.6/Dockerfile.prod
@@ -1,4 +1,4 @@
-FROM php:7.3.29-fpm-buster@sha256:9fa6acffa9b016b8090e9f20b225fc2d83183b58c49d0290038c7b0b07ecdea8
+FROM php:7.4.21-fpm-buster@sha256:a6747b4ee9b95efbb87dc88104be54c44ab63f086eb8c0aa3c19980118ea6040
 
 SHELL [ "/bin/bash", "-exo", "pipefail", "-c" ]