diff --git a/src/server/components/FlagManager.ts b/src/server/components/FlagManager.ts
index ea2507b..65bf644 100644
--- a/src/server/components/FlagManager.ts
+++ b/src/server/components/FlagManager.ts
@@ -76,7 +76,7 @@ class FlagManager
         flag.value = data.value;
     }
 
-    getFlag (query: FlagQuery) 
+    getFlag (query: FlagQuery): Flag | null
     {
         const [ flag ] = this.getFlags(query);
         return flag;