diff --git a/modules/gtk.lua b/modules/gtk.lua
new file mode 100644
index 0000000..f048688
--- /dev/null
+++ b/modules/gtk.lua
@@ -0,0 +1,4 @@
+save_config('gtk', [[
+[Settings]
+gtk-application-prefer-dark-theme = {dark}
+]], theme)
diff --git a/themer.lua b/themer.lua
index 734c4f1..4769cbb 100755
--- a/themer.lua
+++ b/themer.lua
@@ -29,4 +29,5 @@ require 'modules/fuzzel'
 require 'modules/lock'
 require 'modules/shell'
 require 'modules/vis'
+require 'modules/gtk'