diff --git a/@plotly/webpack-dash-dynamic-import/package.json b/@plotly/webpack-dash-dynamic-import/package.json
index f90e00d8dc..0d23122118 100644
--- a/@plotly/webpack-dash-dynamic-import/package.json
+++ b/@plotly/webpack-dash-dynamic-import/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@plotly/webpack-dash-dynamic-import",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Webpack Plugin for Dynamic Import in Dash",
   "repository": {
     "type": "git",
diff --git a/@plotly/webpack-dash-dynamic-import/src/index.js b/@plotly/webpack-dash-dynamic-import/src/index.js
index 490e66b904..85d8388301 100644
--- a/@plotly/webpack-dash-dynamic-import/src/index.js
+++ b/@plotly/webpack-dash-dynamic-import/src/index.js
@@ -78,6 +78,10 @@ class WebpackDashDynamicImport {
     apply(compiler) {
         compiler.hooks.compilation.tap('WebpackDashDynamicImport', compilation => {
             compilation.mainTemplate.hooks.requireExtensions.tap('WebpackDashDynamicImport > RequireExtensions', (source, chunk, hash) => {
+                // Prevent CSS chunks having JS appended
+                if (chunk.name === 'mini-css-extract-plugin') {
+                    return source;
+                }
                 return source + resolveImportSource();
             });
         });