diff --git a/modules/lang/data/config.el b/modules/lang/data/config.el
index 80134d84d..a7a8424f8 100644
--- a/modules/lang/data/config.el
+++ b/modules/lang/data/config.el
@@ -44,8 +44,8 @@
 
 (def-project-mode! +data-ansible-mode
   :modes (yaml-mode)
-  :files "roles/")
+  :files ("roles/"))
 
 (def-project-mode! +data-vagrant-mode
-  :files "Vagrantfile")
+  :files ("Vagrantfile"))
 
diff --git a/modules/lang/javascript/config.el b/modules/lang/javascript/config.el
index adda012bc..58e89c416 100644
--- a/modules/lang/javascript/config.el
+++ b/modules/lang/javascript/config.el
@@ -210,10 +210,10 @@
   :on-load (load! "+screeps"))
 
 (def-project-mode! +javascript-gulp-mode
-  :files "gulpfile.js")
+  :files ("gulpfile.js"))
 
 (def-project-mode! +javascript-npm-mode
   :modes (html-mode css-mode web-mode js2-mode markdown-mode)
-  :files "package.json"
+  :files ("package.json")
   :add-hooks (+javascript|add-node-modules-path))
 
diff --git a/modules/lang/php/config.el b/modules/lang/php/config.el
index bcbf730f4..8485d9521 100644
--- a/modules/lang/php/config.el
+++ b/modules/lang/php/config.el
@@ -98,5 +98,5 @@
 
 (def-project-mode! +php-composer-mode
   :modes (web-mode php-mode)
-  :files "composer.json")
+  :files ("composer.json"))