diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for greskell
 
+## 2.0.3.4  -- 2026-04-21
+
+- Bump dependency version bounds.
+
 ## 2.0.3.3  -- 2025-01-30
 
 * Binder: now `newBind` produces an expression like `((__v0))`, that is, a variable name wrapped with double parens.
diff --git a/greskell.cabal b/greskell.cabal
--- a/greskell.cabal
+++ b/greskell.cabal
@@ -1,5 +1,5 @@
 name:                   greskell
-version:                2.0.3.3
+version:                2.0.3.4
 author:                 Toshio Ito <debug.ito@gmail.com>
 maintainer:             Toshio Ito <debug.ito@gmail.com>
 license:                BSD3
@@ -40,7 +40,7 @@
                         Data.Greskell.NonEmptyLike,
                         Data.Greskell.Logic
   -- other-modules:        
-  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0,
+  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0 || ^>=4.22.0,
                         greskell-core ^>=1.0.0,
                         text ^>=1.2.3 || ^>=2.0.2 || ^>=2.1,
                         transformers ^>=0.5.6 || ^>=0.6.1,
@@ -69,7 +69,7 @@
                         Data.Greskell.LogicSpec,
                         ExamplesSpec
   build-tool-depends:   hspec-discover:hspec-discover
-  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0,
+  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0 || ^>=4.22.0,
                         text ^>=1.2.3 || ^>=2.0.2 || ^>=2.1,
                         aeson ^>=2.0.2 || ^>=2.1.0 || ^>=2.2.3,
                         unordered-containers ^>=0.2.15,
@@ -84,7 +84,7 @@
   hs-source-dirs:       test
   ghc-options:          -Wall -fno-warn-unused-imports "-with-rtsopts=-M512m"
   main-is:              Typecheck.hs
-  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0,
+  build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0 || ^>=4.22.0,
                         hspec ^>=2.9.1 || ^>=2.10.6 || ^>=2.11.9,
                         greskell,
                         should-not-typecheck ^>=2.1.0
@@ -104,7 +104,7 @@
   other-modules:        ServerTest.Common
   if flag(server-test)
     -- Explicitly remove dependency. See https://github.com/haskell/cabal/issues/1725
-    build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0,
+    build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0 || ^>=4.22.0,
                           aeson ^>=2.0.2 || ^>=2.1.0 || ^>=2.2.3,
                           hspec ^>=2.9.1 || ^>=2.10.6 || ^>=2.11.9,
                           text ^>=1.2.3 || ^>=2.0.2 || ^>=2.1,
@@ -135,7 +135,7 @@
   other-extensions:     OverloadedStrings
   other-modules:        ServerTest.Common
   if flag(server-behavior-test)
-    build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0,
+    build-depends:        base ^>=4.13.0 || ^>=4.14.0 || ^>=4.15.0 || ^>=4.16.0 || ^>=4.17.0 || ^>=4.18.0 || ^>=4.19.0 || ^>=4.20.0 || ^>=4.21.0 || ^>=4.22.0,
                           aeson ^>=2.0.2 || ^>=2.1.0 || ^>=2.2.3,
                           hspec ^>=2.9.1 || ^>=2.10.6 || ^>=2.11.9,
                           text ^>=1.2.3 || ^>=2.0.2 || ^>=2.1,