diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 00585bc..29679af 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -2,7 +2,7 @@ name: Publish Docker image
 on:
     push:
         tags:
-            - latest
+            - "7"
 
 jobs:
     push_to_registry:
@@ -30,5 +30,5 @@ jobs:
                   # See: https://github.com/docker/buildx/issues/59
                   ACTION: push
                   DOCKER_BUILDKIT: 1
-                  IMAGE_TAG: docker.io/botsudo/phpunit:latest
+                  IMAGE_TAG: docker.io/botsudo/phpunit:7
                   PLATFORM: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 96f5d8d..1f54d1c 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -4,14 +4,14 @@
 # PHPUnit 9 >= PHP 7.3
 # PHPUnit 8	>= PHP 7.2
 # PHPUnit 7	PHP 7.1 - PHP 7.3
-FROM php:8.1-cli-alpine
+FROM php:7.4-cli-alpine
 
-ARG RELEASE_VERSION=latest
+ARG RELEASE_VERSION=7.5.20
 
 # Metadata params
 ARG VCS_REF
 ARG BUILD_DATE
-ARG DIST_URL="https://phar.phpunit.de/phpunit.phar"
+ARG DIST_URL="https://phar.phpunit.de/phpunit-${RELEASE_VERSION}.phar"
 
 ADD $DIST_URL /usr/bin/phpunit
 RUN chmod +x /usr/bin/phpunit && phpunit --version