diff --git a/stack.yaml b/stack.yaml
index 42de3c427..532c0f31e 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-# stack build plan using GHC 9.12.3
+# stack build plan using GHC 9.12.2
 # https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.12
 # https://downloads.haskell.org/ghc/9.12.1/docs/users_guide/9.12.1-notes.html
 # https://downloads.haskell.org/ghc/9.12.2/docs/users_guide/9.12.2-notes.html
@@ -10,7 +10,7 @@ packages:
 - hledger-ui
 - hledger-web
 
-resolver: nightly-2026-01-08
+resolver: nightly-2025-09-30
 
 notify-if-ghc-untested:   false
 notify-if-cabal-untested: false