diff --git a/stack.yaml b/stack.yaml
index 696526176..8dc21c64f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -2,7 +2,7 @@
 # https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.10
 # https://downloads.haskell.org/ghc/9.10.1/docs/users_guide/9.10.1-notes.html
 
-resolver: nightly-2024-12-19
+resolver: nightly-2025-02-15
 
 packages:
 - hledger-lib
@@ -13,10 +13,7 @@ packages:
 # To minimise problems, use the versions shipped with GHC 9.10.1 when possible.
 # See https://github.com/haskell/unix/issues/329.
 extra-deps:
-# - base-compat-0.14.0
-
 # for hledger-lib
-- encoding-0.10
 # - Cabal-3.12.0.0
 # - Cabal-syntax-3.12.0.0
 # #- directory-1.3.8.3
diff --git a/stack9.12.yaml b/stack9.12.yaml
index 98f1f0a43..4cdecdbf2 100644
--- a/stack9.12.yaml
+++ b/stack9.12.yaml
@@ -2,7 +2,7 @@
 # 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
 
-resolver: nightly-2024-12-19
+resolver: nightly-2025-02-15
 compiler: ghc-9.12.1
 notify-if-ghc-untested: false
 notify-if-cabal-untested: false
@@ -19,7 +19,6 @@ extra-deps:
 # - base-compat-0.14.0
 
  # for hledger-lib
-- encoding-0.10
 # - Cabal-3.12.0.0
 # - Cabal-syntax-3.12.0.0
 # #- directory-1.3.8.3
diff --git a/stack9.6.yaml b/stack9.6.yaml
index 8a25a36a3..653547b02 100644
--- a/stack9.6.yaml
+++ b/stack9.6.yaml
@@ -1,6 +1,6 @@
-# stack build plan using GHC 9.6.4
+# stack build plan using GHC 9.6.6
 
-resolver: lts-22.17
+resolver: lts-22.43
 
 packages:
 - hledger-lib
diff --git a/stack9.8.yaml b/stack9.8.yaml
index 3c72c3710..893081b29 100644
--- a/stack9.8.yaml
+++ b/stack9.8.yaml
@@ -1,6 +1,6 @@
 # stack build plan using GHC 9.8.4
 
-resolver: lts-23.0
+resolver: lts-23.8
 
 packages:
 - hledger-lib