diff --git a/lib/extensions/development.el b/lib/extensions/development.el
index 178dcf9..02e2ea3 100644
--- a/lib/extensions/development.el
+++ b/lib/extensions/development.el
@@ -13,6 +13,8 @@
 (with-ability parinfer
               (depends-on 'parinfer))
 
+(with-ability yaml
+              (depends-on 'yaml-mode))
 ;; (with-ability hl
 ;;               (depends-on 'hl-sexp))
 
diff --git a/lib/extensions/development/init.el b/lib/extensions/development/init.el
index 42a5d31..39e42b8 100644
--- a/lib/extensions/development/init.el
+++ b/lib/extensions/development/init.el
@@ -174,6 +174,12 @@
            ;; TODO: use autopair mode if electric pair was not as good as autopair
            (electric-pair-mode))
 
+  (ability yaml ()
+           "YAML editor."
+           (require 'yaml-mode)
+           (add-to-list 'auto-mode-alist '("\\.yml\\'" . yaml-mode))
+           (add-to-list 'auto-mode-alist '("\\.sls\\'" . yaml-mode)))
+
   (ability code-browser ()
            "Adds the code browser to FG42."
            (require 'neotree)