diff --git a/docs/contributors/guidelines.rst b/docs/contributors/guidelines.rst
index 94965694..31e29e54 100644
--- a/docs/contributors/guidelines.rst
+++ b/docs/contributors/guidelines.rst
@@ -72,7 +72,7 @@ A Mailu container should provide one service and run one type of process only.
 A new Webmail should be in a separate container, a new antivirus or a new
 antispam should be in a separate container.
 
-A container is developped as a single directory under the proper category in
+A container is developed as a single directory under the proper category in
 the main repository, the only exception being service containers that should
 only use official Docker images. Categories are: