diff --git a/Cask b/Cask
new file mode 100644
index 00000000000..60fa07cbdf2
--- /dev/null
+++ b/Cask
@@ -0,0 +1,7 @@
+(source gnu)
+(source melpa)
+
+(package-file "which-key.el")
+
+(development
+ (depends-on "ert"))