diff --git a/snap-src/bin/mongodb-control b/snap-src/bin/mongodb-control
index 246c3acba..92bc36d63 100755
--- a/snap-src/bin/mongodb-control
+++ b/snap-src/bin/mongodb-control
@@ -66,3 +66,5 @@ fi
 
 # Drop indexes on database upgrade, when starting MongoDB
 #mongo wekan --eval "db.getCollectionNames().forEach(function(col_name) { var coll = db.getCollection(col_name); coll.dropIndexes(); });" $BIND_OPTIONS
+
+mongo wekan --eval 'db.adminCommand({ setFeatureCompatibilityVersion: "4.2" });' $BIND_OPTIONS