diff --git a/README.md b/README.md
index 1afba05..a5a3b8c 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,8 @@ abPOA provides two conensus calling methods:
 * heaviest bundlding (default): the path with largest weight along the partial order graph
 * most frequent bases: pick the most common base at each alignment position
 
-Sometimes these two methods will generate different consensus sequences (#67).
+Sometimes these two methods will generate different consensus sequences [#67](https://github.com/yangao07/abPOA/issues/67)
+
 
 To use `most frequent bases` method:
 ```