diff --git a/postcss.config.js b/postcss.config.js
index 274ed56..e371f68 100644
--- a/postcss.config.js
+++ b/postcss.config.js
@@ -11,9 +11,11 @@ module.exports = {
         preset: 'default'
       })
       : null,
-    purgecss({
-      content: ['./src/*.htm'],
-      defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || []
-    })
+    process.env.NODE_ENV === 'production'
+      ? purgecss({
+        content: ['./src/*.htm'],
+        defaultExtractor: content => content.match(/[\w-/:]+(?<!:)/g) || []
+      })
+      :null,
   ]
 }