diff --git a/lib/index.js b/lib/index.js
index 906ae14..41fc9e4 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -49,7 +49,7 @@ const withOptimizedImages = (nextConfig = {}, nextComposePlugins = {}) => {
                 subRule.issuer && !subRule.test && !subRule.include && subRule.exclude
                 && subRule.use && subRule.use.options && subRule.use.options.name
               ) {
-                if (String(subRule.issuer.test) === '/\\.(css|scss|sass)$/' && subRule.use.options.name.startsWith('static/media/')) {
+                if ((String(subRule.issuer.test) === '/\\.(css|scss|sass)$/' || String(subRule.issuer) === '/\\.(css|scss|sass)$/') && subRule.use.options.name.startsWith('static/media/')) {
                   subRule.exclude.push(/\.(jpg|jpeg|png|svg|webp|gif|ico)$/);
                 }
               }