diff --git a/src/compileCss.js b/src/compileCss.js
index f0a85f4..a196f23 100644
--- a/src/compileCss.js
+++ b/src/compileCss.js
@@ -17,7 +17,6 @@ module.exports = customConfig => {
     dst: './dist/css',
     compassSassDir: undefined,
     compassImportPath: './node_modules',
-    sourceMap: (process.env.NODE_ENV !== 'production'),
   }, customConfig);
 
   if (!config.src) {
@@ -43,7 +42,7 @@ module.exports = customConfig => {
         css: config.dst,
         import_path: config.compassImportPath,
         sass: config.compassSassDir,
-        sourcemap: config.sourceMap,
+        sourcemap: (process.env.NODE_ENV !== 'production'),
       }))
       .on('error', function onCompileScssError() {
         // Continue watching when an error occurs.
diff --git a/src/compileCss.spec.js b/src/compileCss.spec.js
index ad90a50..61a8ad1 100644
--- a/src/compileCss.spec.js
+++ b/src/compileCss.spec.js
@@ -23,7 +23,6 @@ describe('compileCss method', () => {
         dst: './dist/css',
         compassSassDir: './src',
         compassImportPath: './node_modules',
-        sourceMap: true,
       });
     });