diff --git a/.changeset/funny-cougars-work.md b/.changeset/funny-cougars-work.md
new file mode 100644
index 00000000..9671bb52
--- /dev/null
+++ b/.changeset/funny-cougars-work.md
@@ -0,0 +1,5 @@
+---
+'@hono/eslint-config': patch
+---
+
+fix: set `curly` rule as `all`
diff --git a/packages/eslint-config/index.js b/packages/eslint-config/index.js
index 9c496241..c79044a5 100644
--- a/packages/eslint-config/index.js
+++ b/packages/eslint-config/index.js
@@ -21,6 +21,7 @@ module.exports = defineConfig({
     addEventListener: false,
   },
   rules: {
+    curly: ['error', 'all'],
     quotes: ['error', 'single'],
     semi: ['error', 'never'],
     'no-debugger': ['error'],