diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 092524cd..6ba67ac6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -17,7 +17,7 @@ Contributors will be credited within the intranet and on the github page.
 * [ ] Add more dockers
   - [X] MySQL 5.6
   - [X] MySQL 5.7 [#1](https://github.com/cytopia/devilbox/issues/1)
-  - [ ] MariaDB 5.5 [#2](https://github.com/cytopia/devilbox/issues/2)
+  - [X] MariaDB 5.5 [#2](https://github.com/cytopia/devilbox/issues/2)
   - [ ] MariaDB 10.0 [#3](https://github.com/cytopia/devilbox/issues/3)
   - [ ] MariaDB 10.2 [#6](https://github.com/cytopia/devilbox/issues/6)
   - [ ] MariaDB 10.2 [#7](https://github.com/cytopia/devilbox/issues/7)