diff --git a/rollup.config.js b/rollup.config.js
index 09e52c4..22c9949 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -130,20 +130,21 @@ export default {
     /*
     ** Service worker
     */
-    serviceworker: {
-    	input: sapperConfig.serviceworker.input(),
-    	output: sapperConfig.serviceworker.output(),
-    	plugins: [
-    		resolve(),
-         aliases,
-    		replace({
-    			'process.browser': true,
-    			...replaceOptions
-    		}),
-    		commonjs(),
-    		!dev && terser()
-    	],
-
-    	onwarn,
-    }
+    ...(!dev && {
+        serviceworker: {
+            input: sapperConfig.serviceworker.input(),
+            output: sapperConfig.serviceworker.output(),
+            plugins: [
+                resolve(),
+            aliases,
+                replace({
+                    'process.browser': true,
+                    ...replaceOptions
+                }),
+                commonjs(),
+                !dev && terser()
+            ],
+            onwarn,
+        }
+    })
 }