diff --git a/index.js b/index.js
index 03669cc..e0c2b0a 100644
--- a/index.js
+++ b/index.js
@@ -30,7 +30,11 @@ module.exports = function (file, opts) {
                 readdir: readdir
             }
         },
-        { vars: vars, varModules: { path: path } }
+        {
+            vars: vars,
+            varModules: { path: path },
+            sourceMap: opts && (opts.sourceMap || opts._flags && opts._flags.debug)
+        }
     );
     return sm;
     
diff --git a/package.json b/package.json
index f67a587..1df2379 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "quote-stream": "^1.0.1",
     "resolve": "^1.1.5",
-    "static-module": "^2.1.1",
+    "static-module": "^2.2.0",
     "through2": "^2.0.0"
   },
   "devDependencies": {