diff --git a/stack.yaml b/stack.yaml
index 07bc085..7a7344c 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -6,4 +6,4 @@ packages:
 - '.'
 - '../geval'
 extra-deps: [markdown-0.1.13.2,geval-0.1.0.0]
-resolver: nightly-2015-08-20
+resolver: lts-3.11