diff --git a/empower/empower-tests.ts b/empower/empower-tests.ts
index 3a5cbe1504..27b1894c6a 100644
--- a/empower/empower-tests.ts
+++ b/empower/empower-tests.ts
@@ -1,13 +1,13 @@
 /// <reference path="./empower.d.ts" />
 
-var baseAssert: any;
-var fakeFormatter: any;
+var baseAssert:any;
+var fakeFormatter:any;
 
 ()=> {
     var assert = empower(baseAssert, fakeFormatter);
 };
 
-var option: empower.Options = {
+var option:empower.Options = {
     modifyMessageOnRethrow: false,
     saveContextOnRethrow: false
 };
diff --git a/empower/empower.d.ts b/empower/empower.d.ts
index 02b34cbcaa..bf4f3d6874 100644
--- a/empower/empower.d.ts
+++ b/empower/empower.d.ts
@@ -3,7 +3,7 @@
 // Definitions by: vvakame <https://github.com/vvakame>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-declare function empower(originalAssert: any, formatter: any, options?: empower.Options): any;
+declare function empower(originalAssert:any, formatter:any, options?:empower.Options):any;
 
 declare module empower {
     export interface Options {
diff --git a/power-assert-formatter/power-assert-formatter.d.ts b/power-assert-formatter/power-assert-formatter.d.ts
index c5ad3b6f59..d3ccb59aba 100644
--- a/power-assert-formatter/power-assert-formatter.d.ts
+++ b/power-assert-formatter/power-assert-formatter.d.ts
@@ -3,7 +3,7 @@
 // Definitions by: vvakame <https://github.com/vvakame>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-declare function powerAssertFormatter(options?: powerAssertFormatter.Options): powerAssertFormatter.Formatter;
+declare function powerAssertFormatter(options?:powerAssertFormatter.Options):powerAssertFormatter.Formatter;
 
 declare module powerAssertFormatter {
     export interface Options {
@@ -22,8 +22,8 @@ declare module powerAssertFormatter {
     }
 
     export interface Formatter {
-        (powerAssertContext: any): string;
+        (powerAssertContext:any): string;
     }
 
-    export function defaultOptions(): Options;
+    export function defaultOptions():Options;
 }