diff --git a/README.md b/README.md
index 9d69c57..09c6c22 100644
--- a/README.md
+++ b/README.md
@@ -197,7 +197,7 @@ end
 
 # Upgrading guide from v0.x to v1
 
-See [UPGRADING.md](https://github.com/cookpad/arproxy/main/)
+See [UPGRADING.md](UPGRADING.md)
 
 # Development