diff --git a/_data/contributors.yml b/_data/contributors.yml
index c1b196d7..a0c3d42e 100644
--- a/_data/contributors.yml
+++ b/_data/contributors.yml
@@ -35,14 +35,14 @@
     - name: Kazuhito Yokoi
       githubId: '20310935'
       links:
-        home: https://hitachi.com
+        home: https://www.hitachi-ac.co.jp/en/
         github: https://github.com/kazuhitoyokoi
     - name: Hiroyasu Nishiyama
       githubId: '30289092'
       links:
-        home: https://hitachi.com
+        home: https://www.hitachi.com
         github: https://github.com/HiroyasuNishiyama
     - name: Mauricio Bonani
       githubId: '29807944'
       links:
-        github: https://github.com/bonanitech
\ No newline at end of file
+        github: https://github.com/bonanitech