diff --git a/composer.json b/composer.json
index 0bc0958d5..e53b05eab 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         }
     },
     "require": {
-        "solarium/solarium": "~5",
+        "solarium/solarium": "~4",
         "symfony/event-dispatcher": "^3.4"
     },
     "require-dev": {