diff --git a/stack.yaml b/stack.yaml
index 3aef138..b06bc4d 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -15,7 +15,7 @@
 # resolver:
 #  name: custom-snapshot
 #  location: "./custom-snapshot.yaml"
-resolver: lts-8.18
+resolver: lts-11.9
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.