diff --git a/dist/npmts.plugins.d.ts b/dist/npmts.plugins.d.ts
index 6b55acc..19adfa9 100644
--- a/dist/npmts.plugins.d.ts
+++ b/dist/npmts.plugins.d.ts
@@ -7,6 +7,7 @@ export declare let g: {
     jsdoc3: any;
     mocha: any;
     replace: any;
+    sourcemaps: any;
 };
 export declare let lodashObject: any;
 export declare let merge2: any;
diff --git a/dist/npmts.plugins.js b/dist/npmts.plugins.js
index 496506e..158f0c1 100644
--- a/dist/npmts.plugins.js
+++ b/dist/npmts.plugins.js
@@ -7,7 +7,8 @@ exports.g = {
     istanbul: require("gulp-istanbul"),
     jsdoc3: require("gulp-jsdoc3"),
     mocha: require("gulp-mocha"),
-    replace: require("gulp-replace")
+    replace: require("gulp-replace"),
+    sourcemaps: require("gulp-sourcemaps")
 };
 exports.lodashObject = require('lodash/fp/object');
 exports.merge2 = require("merge2");
diff --git a/dist/npmts.tests.js b/dist/npmts.tests.js
index c13542a..d8fe49c 100644
--- a/dist/npmts.tests.js
+++ b/dist/npmts.tests.js
@@ -11,7 +11,9 @@ var istanbul = function (configArg) {
     npmts_promisechain_1.npmtsOra.text("Instrumentalizing transpiled JS...");
     var done = plugins.Q.defer();
     var stream = plugins.gulp.src([plugins.path.join(paths.cwd, "dist/*.js")])
+        .pipe(plugins.g.sourcemaps.init())
         .pipe(plugins.g.istanbul()) // Covering files
+        .pipe(plugins.g.sourcemaps.write())
         .pipe(plugins.g.istanbul.hookRequire()) // Force `require` to return covered files
         .pipe(plugins.g.gFunction(function () {
         plugins.beautylog.ok("JS has been instrumentalized to get test code coverage!");
diff --git a/package.json b/package.json
index 081cd59..8e1d40b 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "gulp-jsdoc3": "^0.3.0",
     "gulp-mocha": "^2.2.0",
     "gulp-replace": "^0.5.4",
+    "gulp-sourcemaps": "^1.6.0",
     "lodash": "^4.13.1",
     "merge2": "1.0.2",
     "projectinfo": "1.0.3",
diff --git a/ts/npmts.plugins.ts b/ts/npmts.plugins.ts
index 8d42322..0d9c9ab 100644
--- a/ts/npmts.plugins.ts
+++ b/ts/npmts.plugins.ts
@@ -6,7 +6,8 @@ export let g = {
     istanbul: require("gulp-istanbul"),
     jsdoc3: require("gulp-jsdoc3"),
     mocha: require("gulp-mocha"),
-    replace: require("gulp-replace")
+    replace: require("gulp-replace"),
+    sourcemaps: require("gulp-sourcemaps")
 };
 export let lodashObject = require('lodash/fp/object');
 export let merge2 = require("merge2");
diff --git a/ts/npmts.tests.ts b/ts/npmts.tests.ts
index 42871b9..8f7a251 100644
--- a/ts/npmts.tests.ts
+++ b/ts/npmts.tests.ts
@@ -11,7 +11,9 @@ let istanbul = function (configArg) {
     npmtsOra.text("Instrumentalizing transpiled JS...");
     let done = plugins.Q.defer();
     var stream = plugins.gulp.src([plugins.path.join(paths.cwd,"dist/*.js")])
+        .pipe(plugins.g.sourcemaps.init())
         .pipe(plugins.g.istanbul()) // Covering files
+        .pipe(plugins.g.sourcemaps.write())
         .pipe(plugins.g.istanbul.hookRequire()) // Force `require` to return covered files
         .pipe(plugins.g.gFunction(function(){
             plugins.beautylog.ok("JS has been instrumentalized to get test code coverage!");