diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5f8d11d4..50e08205 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,10 @@ jobs:
 
     services:
       mongo:
-        image: mongo
+        image: mongo:4.4.4
+        env:
+          MONGO_INITDB_ROOT_USERNAME: mongoadmin
+          MONGO_INITDB_ROOT_PASSWORD: mongoadmin
         options: >-
           --health-cmd "echo 'db.stats().ok' | mongo localhost:27017/mongoadmin --quiet"
           --health-interval 10s