diff --git a/package.json b/package.json
index f081e4e..09334f1 100644
--- a/package.json
+++ b/package.json
@@ -1,42 +1,42 @@
 {
-    "name": "clime",
-    "version": "0.4.1",
-    "description": "The command-line interface framework for TypeScript.",
-    "main": "bld/index.js",
-    "typings": "bld/index.d.ts",
-    "scripts": {
-        "test": "mocha",
-        "build": "tsc"
-    },
-    "repository": {
-        "type": "git",
-        "url": "git+https://github.com/vilic/clime.git"
-    },
-    "keywords": [
-        "typescript",
-        "command",
-        "cli",
-        "commander",
-        "commander.js"
-    ],
-    "author": "vilicvane",
-    "license": "MIT",
-    "bugs": {
-        "url": "https://github.com/vilic/clime/issues"
-    },
-    "homepage": "https://github.com/vilic/clime#readme",
-    "dependencies": {
-        "chalk": "^1.1.1",
-        "extendable-error": "^0.1.2",
-        "hyphenate": "^0.2.1",
-        "reflect-metadata": "^0.1.3",
-        "villa": "^0.2.0"
-    },
-    "devDependencies": {
-        "chai": "^3.5.0",
-        "chai-as-promised": "^5.3.0",
-        "mocha": "^3.0.2",
-        "source-map-support": "^0.4.0",
-        "typescript": "^2.0.2"
-    }
+  "name": "clime",
+  "version": "0.4.2",
+  "description": "The command-line interface framework for TypeScript.",
+  "main": "bld/index.js",
+  "typings": "bld/index.d.ts",
+  "scripts": {
+    "test": "mocha",
+    "build": "tsc"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/vilic/clime.git"
+  },
+  "keywords": [
+    "typescript",
+    "command",
+    "cli",
+    "commander",
+    "commander.js"
+  ],
+  "author": "vilicvane",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/vilic/clime/issues"
+  },
+  "homepage": "https://github.com/vilic/clime#readme",
+  "dependencies": {
+    "chalk": "^1.1.1",
+    "extendable-error": "^0.1.2",
+    "hyphenate": "^0.2.1",
+    "reflect-metadata": "^0.1.3",
+    "villa": "^0.2.0"
+  },
+  "devDependencies": {
+    "chai": "^3.5.0",
+    "chai-as-promised": "^5.3.0",
+    "mocha": "^3.0.2",
+    "source-map-support": "^0.4.0",
+    "typescript": "^2.0.3"
+  }
 }
diff --git a/src/core/command/param.ts b/src/core/command/param.ts
index aff9a1a..8a43d10 100644
--- a/src/core/command/param.ts
+++ b/src/core/command/param.ts
@@ -1,5 +1,7 @@
 import * as assert from 'assert';
 
+import hyphenate from 'hyphenate';
+
 import {
     Command,
     GeneralValidator
@@ -63,8 +65,7 @@ export function param<T>(
         description
     }: ParamOptions<T> = {}
 ) {
-    // TODO: name: 'execute'
-    return (target: Command, name: string, index: number) => {
+    return (target: Command, name: 'execute', index: number) => {
         assert.equal(name, 'execute');
 
         let constructor = target.constructor as typeof Command;
@@ -80,7 +81,8 @@ export function param<T>(
         type = type ||
             Reflect.getMetadata('design:paramtypes', target, 'execute')[index] as Clime.Constructor<T>;
 
-        paramName = paramName || Reflection.getFunctionParameterName(target.execute, index);
+        paramName = paramName ||
+            hyphenate(Reflection.getFunctionParameterName(target.execute, index), { lowerCase: true });
 
         if (!validators) {
             validators = validator ? [validator] : [];
diff --git a/src/core/command/params.ts b/src/core/command/params.ts
index 2aa15bc..d714709 100644
--- a/src/core/command/params.ts
+++ b/src/core/command/params.ts
@@ -1,5 +1,7 @@
 import * as assert from 'assert';
 
+import hyphenate from 'hyphenate';
+
 import {
     Command,
     GeneralValidator
@@ -59,8 +61,7 @@ export function params<T>(
         description
     }: ParamsOptions<T>
 ) {
-    // TODO: name: 'execute'
-    return (target: Command, name: string, index: number) => {
+    return (target: Command, name: 'execute', index: number) => {
         assert.equal(name, 'execute');
 
         let constructor = target.constructor as typeof Command;
@@ -74,7 +75,8 @@ export function params<T>(
         type = type ||
             Reflect.getMetadata('design:paramtypes', target, 'execute')[index] as Clime.Constructor<T>;
 
-        paramName = paramName || Reflection.getFunctionParameterName(target.execute, index);
+        paramName = paramName ||
+            hyphenate(Reflection.getFunctionParameterName(target.execute, index), { lowerCase: true });
 
         if (!validators) {
             validators = validator ? [validator] : [];