diff --git a/.gitattributes b/.gitattributes
index 148220b..bea40f6 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -10,6 +10,7 @@
 *.txt text
 *.xml text
 *.yml text
+*.yaml text
 
 *.ico binary
 *.jpg binary
diff --git a/RoboFile.php b/RoboFile.php
index 8e44e49..e4adabd 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -43,7 +43,7 @@ class RoboFile extends Tasks {
       ->addTask($this->taskFilesystemStack()
         ->copy('CHANGELOG.md', 'doc/about/changelog.md')
         ->copy('LICENSE.md', 'doc/about/license.md'))
-      ->addTask($this->taskExec('mkdocs build --config-file=etc/mkdocs.yml'))
+      ->addTask($this->taskExec('mkdocs build --config-file=etc/mkdocs.yaml'))
       ->addTask($this->taskFilesystemStack()
         ->remove(['doc/about/changelog.md', 'doc/about/license.md']))
       ->run();
diff --git a/etc/mkdocs.yml b/etc/mkdocs.yaml
similarity index 100%
rename from etc/mkdocs.yml
rename to etc/mkdocs.yaml