diff --git a/src/ensembl/.storybook/webpack.config.js b/src/ensembl/.storybook/webpack.config.js
index bfaeee3d0..6f64991ee 100644
--- a/src/ensembl/.storybook/webpack.config.js
+++ b/src/ensembl/.storybook/webpack.config.js
@@ -34,8 +34,9 @@ module.exports = ({ config }) => {
         loader: 'css-loader',
         options: {
           sourceMap: true,
-          modules: true,
-          localIdentName: '[local]__[name]__[hash:base64:5]'
+          modules: {
+            localIdentName: '[local]__[name]__[hash:base64:5]'
+          }
         }
       },
       {
diff --git a/src/ensembl/webpack/webpack.common.js b/src/ensembl/webpack/webpack.common.js
index 9df4d5703..bcbbc25c0 100644
--- a/src/ensembl/webpack/webpack.common.js
+++ b/src/ensembl/webpack/webpack.common.js
@@ -58,8 +58,9 @@ module.exports = (isDev, moduleRules, plugins) => ({
             loader: 'css-loader',
             options: {
               sourceMap: true,
-              modules: true,
-              localIdentName: '[local]__[name]__[hash:base64:5]'
+              modules: {
+                localIdentName: '[local]__[name]__[hash:base64:5]'
+              },
             }
           },
           {