diff --git a/stack.yaml b/stack.yaml
index 74e27d2..585eb87 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -2,3 +2,7 @@ resolver: lts-10.0
 
 packages:
   - .
+
+extra-deps:
+  - butcher-1.3.0.0
+  - ghc-exactprint-0.5.6.0