diff --git a/graph/hopcroft_karp.cpp b/graph/hopcroft_karp.cpp
index 6e75545c3..88d9d5754 100644
--- a/graph/hopcroft_karp.cpp
+++ b/graph/hopcroft_karp.cpp
@@ -184,8 +184,8 @@ bool BGraph::bfs()
 /**
  * Function documentation
  * @param u represents position of vertex
- * @returns 'true' if there is an augmenting path beginning with free vertex u
- * @returns 'false' if there is no augmenting path beginning with free vertex u
+ * @returns `true` if there is an augmenting path beginning with free vertex u
+ * @returns `false` if there is no augmenting path beginning with free vertex u
  */
 bool BGraph::dfs(int u)
 {