diff --git a/Shake.hs b/Shake.hs
index e015cc485..d2a6d0f21 100755
--- a/Shake.hs
+++ b/Shake.hs
@@ -1,5 +1,5 @@
 #!/usr/bin/env stack
-{- stack script --resolver nightly-2024-12-19 --compile
+{- stack script --resolver nightly-2025-04-01 --compile
    --extra-include-dirs /Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/usr/include/ffi
    --package base-prelude
    --package directory
diff --git a/bin/hledger-register-max.hs b/bin/hledger-register-max.hs
index 481cafd5f..ca5c1de12 100755
--- a/bin/hledger-register-max.hs
+++ b/bin/hledger-register-max.hs
@@ -1,7 +1,7 @@
 #!/usr/bin/env stack
 -- stack runghc
 -- (requires hledger > 1.34)
--- -- stack script --compile --resolver nightly-2024-12-19 --verbosity error --package hledger-lib --package hledger --package text --package safe
+-- -- stack script --compile --resolver nightly-2025-04-01 --verbosity error --package hledger-lib --package hledger --package text --package safe
 
 -- hledger-register-max - runs "hledger register" and prints the posting with largest running total/balance.
 -- Usage:
diff --git a/bin/hledger-register-max2.hs b/bin/hledger-register-max2.hs
index 222ffba1d..47a96d2ba 100755
--- a/bin/hledger-register-max2.hs
+++ b/bin/hledger-register-max2.hs
@@ -1,8 +1,8 @@
 #!/usr/bin/env stack
 -- stack runghc --verbosity error --package hledger
 -- stack runghc --verbosity error --package hledger --package hledger-lib --package text --package safe 
--- stack script --compile --resolver nightly-2024-12-19 --verbosity error --package hledger --package text
--- stack script --compile --resolver nightly-2024-12-19 --verbosity error --package hledger --package hledger-lib --package text --package safe
+-- stack script --compile --resolver nightly-2025-04-01 --verbosity error --package hledger --package text
+-- stack script --compile --resolver nightly-2025-04-01 --verbosity error --package hledger --package hledger-lib --package text --package safe
 -- The topmost stack command above is used to run this script.
 -- stack script uses released hledger, stack runghc uses local hledger source.
 -- This script currently requires local hledger source, for Hledger.Cli.Script.
diff --git a/bin/hledger-report1.hs b/bin/hledger-report1.hs
index 5fceca87f..a65cb5a61 100755
--- a/bin/hledger-report1.hs
+++ b/bin/hledger-report1.hs
@@ -1,7 +1,7 @@
 #!/usr/bin/env stack
 -- stack runghc --verbosity error --package hledger --package hledger-lib --package text --package safe 
 -- (use the local hledger source)
--- -- stack script --compile --resolver nightly-2024-12-19 --verbosity info --package hledger --package text
+-- -- stack script --compile --resolver nightly-2025-04-01 --verbosity info --package hledger --package text
 -- -- (use a released hledger from stackage)
 
 -- A custom compound report - like incomestatement but with different,
diff --git a/stack.yaml b/stack.yaml
index f5edbd9e8..218a5547d 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-2025-03-01
+resolver: nightly-2025-04-01
 
 packages:
 - hledger-lib
diff --git a/stack9.12.yaml b/stack9.12.yaml
index 48b46655f..3b6b66f7a 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-2025-03-01
+resolver: nightly-2025-04-01
 compiler: ghc-9.12.1
 notify-if-ghc-untested: false
 notify-if-cabal-untested: false
diff --git a/tools/changelogEdit.hs b/tools/changelogEdit.hs
index f399241e6..f1e20201b 100755
--- a/tools/changelogEdit.hs
+++ b/tools/changelogEdit.hs
@@ -1,5 +1,5 @@
 #!/usr/bin/env stack
-{- stack script --resolver nightly-2024-12-19
+{- stack script --resolver nightly-2025-04-01
     --package data-default
     --package extra
     --package process
diff --git a/tools/docshelltest.hs b/tools/docshelltest.hs
index ac4c9f849..8edabc6ca 100755
--- a/tools/docshelltest.hs
+++ b/tools/docshelltest.hs
@@ -1,5 +1,5 @@
 #!/usr/bin/env stack
-{- stack script --resolver nightly-2024-12-19 --compile
+{- stack script --resolver nightly-2025-04-01 --compile
 -}
 -- add this to see packages being installed instead of a long silence:
 --   --verbosity=info
diff --git a/tools/relnotes.hs b/tools/relnotes.hs
index 7b8824aaa..febca1f86 100755
--- a/tools/relnotes.hs
+++ b/tools/relnotes.hs
@@ -1,5 +1,5 @@
 #!/usr/bin/env stack
-{- stack script --resolver nightly-2024-12-19 --compile
+{- stack script --resolver nightly-2025-04-01 --compile
 --package process
 --package split
 -}