diff --git a/.env b/.env
index c4d09a0ca6856..b4c1338b27c23 100644
--- a/.env
+++ b/.env
@@ -16,7 +16,7 @@ LOCAL_PORT=8889
 LOCAL_DIR=src
 
 # The PHP version to use. Valid options are 'latest', and '{version}-fpm'.
-LOCAL_PHP=latest
+LOCAL_PHP=7.4-fpm
 
 ##
 # The PHPUnit version to use when running tests.
diff --git a/docker-compose.yml b/docker-compose.yml
index 5caf08a61a638..66e903d609477 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -32,7 +32,7 @@ services:
   # The PHP container.
   ##
   php:
-    image: wordpressdevelop/php:${LOCAL_PHP-latest}
+    image: wordpressdevelop/php:${LOCAL_PHP-7.4-fpm}
 
     networks:
       - wpdevnet
@@ -62,7 +62,7 @@ services:
   # The MySQL container.
   ##
   mysql:
-    image: ${LOCAL_DB_TYPE-mysql}:${LOCAL_DB_VERSION-latest}
+    image: ${LOCAL_DB_TYPE-mysql}:${LOCAL_DB_VERSION-5.7}
     platform: linux/amd64
 
     networks:
@@ -121,7 +121,7 @@ services:
   # The PHPUnit container.
   ##
   phpunit:
-    image: wordpressdevelop/phpunit:${LOCAL_PHPUNIT-latest}
+    image: wordpressdevelop/phpunit:${LOCAL_PHPUNIT-7.4-fpm}
 
     networks:
       - wpdevnet