diff --git a/.hlint.yaml b/.hlint.yaml
--- a/.hlint.yaml
+++ b/.hlint.yaml
@@ -10,6 +10,15 @@
 # 使い方:
 #   * このファイルをプロジェクトルートに .hlint.yaml としてコピー
 #   * または .hlint.yaml から参照: - arguments: [--hint=path/to/this/.hlint.yaml]
+- extensions:
+    - name:
+        - BlockArguments
+        - CPP
+        - OverloadedRecordDot
+        - OverloadedRecordUpdate
+        - QuasiQuotes
+        - RecursiveDo
+        - TemplateHaskell
 - group:
     enabled: true
     name: generalise
diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,17 @@
 
 ## [Unreleased]
 
+## [1.0.3.1] - 2026-01-08
+
+### Added
+
+- HLint language extension support in Dhall configuration
+- Default language extensions for parsing: `QuasiQuotes`, `CPP`, `RecursiveDo`, `OverloadedRecordDot`,
+  `OverloadedRecordUpdate`, `TemplateHaskell`, `BlockArguments`
+- `ExtensionItem` type and helper functions (`extensionNames`, `extensionNamesWithin`, `extensions`)
+  in `hlint/Builder.dhall`
+- `hlint/rules/extensions.dhall` for managing default enabled extensions
+
 ## [1.0.3.0] - 2026-01-08
 
 ### Added
diff --git a/himari.cabal b/himari.cabal
--- a/himari.cabal
+++ b/himari.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: himari
-version: 1.0.3.0
+version: 1.0.3.1
 synopsis: A standard library for Haskell as an alternative to rio
 description:
   A standard library for Haskell inspired by rio.