diff --git a/Pathfinding/RPriorityQueue.cs b/Pathfinding/RPriorityQueue.cs
index 1bbba5a..daa8e24 100644
--- a/Pathfinding/RPriorityQueue.cs
+++ b/Pathfinding/RPriorityQueue.cs
@@ -16,9 +16,9 @@ public class RPriorityQueue<TKey, TPriority> where TKey : notnull
             queue[key] = priority;
     }
 
-    public TKey? Dequeue()
+    public TKey Dequeue()
     {
-        TKey? retKey = queue.MinBy(item => item.Value).Key;
+        TKey retKey = queue.MinBy(item => item.Value).Key;
         queue.Remove(retKey);
         return retKey;
     }