diff --git a/composer.json b/composer.json
index 23675f1..b9ca9ac 100644
--- a/composer.json
+++ b/composer.json
@@ -15,6 +15,7 @@
         }
     ],
     "require": {
+        "ext-pgsql": "*",
         "silverstripe/framework": "^5",
         "silverstripe/vendor-plugin": "^1.0"
     },