diff --git a/ghci.conf b/ghci.conf
index 3774fbe..ded6777 100644
--- a/ghci.conf
+++ b/ghci.conf
@@ -6,6 +6,10 @@ import Data.Char
 import Data.List
 import Data.Monoid
 
+:set -XDataKinds
+:set -XGADTs
+:set -XKindSignatures
+
 :set prompt "λ: "
 :set -fno-warn-unused-imports