diff --git a/.all-contributorsrc b/.all-contributorsrc
index 60880795..cdb04a20 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -531,6 +531,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "akioyamamoto1977",
+      "name": "Akio Yamamoto",
+      "avatar_url": "https://avatars.githubusercontent.com/u/429219?v=4",
+      "profile": "https://github.com/akioyamamoto1977",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,