diff --git a/mongodb.yaml b/mongodb.yaml
index 925bd34..9d56900 100644
--- a/mongodb.yaml
+++ b/mongodb.yaml
@@ -53,7 +53,8 @@ data:
         rpms:
             mongodb:
                 rationale: MongoDB package.
-                ref: f27
+                # mongodb-3.4.6-3.fc27
+                ref: a655c1f4dd559a5bd0f0142330770f23c2c0d0c9
                 buildorder: 2
             python-pymongo:
                 rationale: MongoDB dependecy for running testsuite.