diff --git a/stack-8.4.yaml b/stack-8.4.yaml
index 6d85b3b..7bbfbb3 100644
--- a/stack-8.4.yaml
+++ b/stack-8.4.yaml
@@ -1,4 +1,4 @@
-resolver: nightly-2018-04-01
+resolver: lts-12.2
 
 packages:
 - '.'
diff --git a/stack.yaml b/stack.yaml
index d0c1516..461dfa7 120000
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-stack-8.2.yaml
\ No newline at end of file
+stack-8.4.yaml
\ No newline at end of file