diff --git a/composer.json b/composer.json
index 3f4d6f9fe..9f7b12c9a 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         "ext-json": "*",
         "composer-plugin-api": "^2.0",
         "drush/drush": "^10|^11|^12",
-        "symfony/yaml": "^3|^4|^5|^6",
+        "symfony/yaml": "3.4.47",
         "twig/twig": "^2|^3",
         "vlucas/phpdotenv": "^4|^5",
         "ext-json": "*"
diff --git a/drainpipe-dev/composer.json b/drainpipe-dev/composer.json
index 6d0a83bf3..2147363da 100644
--- a/drainpipe-dev/composer.json
+++ b/drainpipe-dev/composer.json
@@ -18,10 +18,10 @@
         "mikey179/vfsstream": "^1.6.11",
         "mockery/mockery": "^1.6.7",
         "behat/mink": "^1.11.0",
-        "symfony/phpunit-bridge": "^5|^6",
+        "symfony/phpunit-bridge": "5.4.36",
         "lullabot/drainpipe": "*",
         "mglaman/phpstan-drupal": "^1.2.7",
-        "symfony/yaml": "^3|^4|^5|^6",
+        "symfony/yaml": "3.4.47",
         "drupal/coder": "^8.3.23",
         "behat/mink-browserkit-driver": "^2.2.0",
         "tijsverkoyen/convert-to-junit-xml": "^1.11.0",