diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@
 
 ## [Unreleased]
 
+## [1.1.6.2] - 2026-11-01
+
+### Changed
+
+- Remove the upper bounds of the test-only dependencies `QuickCheck`, `sydtest`, and `hlint`,
+  so that environments enabling tests, such as Stackage,
+  are not blocked each time a new version of them is released
+
 ## [1.1.6.1] - 2026-07-27
 
 ### Changed
@@ -183,11 +191,6 @@
 ### Added
 
 - GHC 9.14.1 support
-
-### Changed
-
-- Relax `sydtest` dependency upper bound from `<0.19` to `<0.24`
-  to support nixpkgs sydtest 0.20.0.1+
 
 ### Removed
 
diff --git a/himari.cabal b/himari.cabal
--- a/himari.cabal
+++ b/himari.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.12
 name: himari
-version: 1.1.6.1
+version: 1.1.6.2
 synopsis: A standard library for Haskell as an alternative to rio
 description:
   A standard library for Haskell inspired by rio.
@@ -165,12 +165,12 @@
     -with-rtsopts=-N
 
   build-depends:
-    QuickCheck >=2.15.0.1 && <2.19,
+    QuickCheck >=2.15.0.1,
     himari,
-    sydtest >=0.18.0.0 && <0.28,
+    sydtest >=0.18.0.0,
 
   build-tool-depends:
-    hlint:hlint >=3.10 && <4
+    hlint:hlint >=3.10
 
   -- hlint経由のghc-lib-parserの参照バージョンに問題が出やすいので、
   -- こちら側でヒントを出して誘導します。