diff --git a/stack.yaml b/stack.yaml
index 7dba411b7..8d66faa1f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,6 +1,6 @@
-# stack build plan using GHC 9.4.5
+# stack build plan using GHC 9.4.6
 
-resolver: lts-21.1
+resolver: lts-21.9
 
 packages:
 - hledger-lib