diff --git a/index.js b/index.js
index 4edf640..35b26c2 100644
--- a/index.js
+++ b/index.js
@@ -172,7 +172,8 @@ var NpmtsCompile;
                     .pipe(plugins.g.typescript({
                     out: outputName,
                     declaration: true,
-                    target: "ES5"
+                    target: "ES5",
+                    module: "commonjs"
                 }));
                 var stream = plugins.mergeStream([
                     tsStream.dts.pipe(plugins.gulp.dest(outputDir)),
diff --git a/ts/npmts.compile.ts b/ts/npmts.compile.ts
index d8fc779..e28a7b0 100644
--- a/ts/npmts.compile.ts
+++ b/ts/npmts.compile.ts
@@ -72,7 +72,8 @@ module NpmtsCompile {
                     .pipe(plugins.g.typescript({
                         out: outputName,
                         declaration: true,
-                        target: "ES5"
+                        target: "ES5",
+                        module: "commonjs"
                     }));
                 var stream = plugins.mergeStream([
                     tsStream.dts.pipe(plugins.gulp.dest(outputDir)),