diff --git a/stack.yaml b/stack.yaml
index b3eb41d3..cef0c7b5 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-6.23
+resolver: lts-2.12
 packages:
   - ./yesod-core
   - ./yesod-static
@@ -25,6 +25,7 @@ extra-deps:
 - cookie-0.4.2
 - cryptonite-0.23
 - foundation-0.0.9
+- memory-0.14.5
 
 - conduit-extra-1.1.14
 - streaming-commons-0.1.16