add colon
diff --git a/readme.md b/readme.md
index 118bdde..93befb1 100644
--- a/readme.md
+++ b/readme.md
@@ -56,7 +56,7 @@
 ## Author
 
 #### 光成滋生 Mitsunari Shigeo
- [GitHub](https//github.com/herumi) | [Website (Japanese)](http://herumi.in.coocan.jp/) | [herumi@nifty.com](mailto:herumi@nifty.com)
+ [GitHub](https://github.com/herumi) | [Website (Japanese)](http://herumi.in.coocan.jp/) | [herumi@nifty.com](mailto:herumi@nifty.com)
 
 ## Sponsors welcome
 [GitHub Sponsor](https://github.com/sponsors/herumi)