diff --git a/src/lib/purgeUnusedStyles.js b/src/lib/purgeUnusedStyles.js
index 240a3e9c7..80fb77798 100644
--- a/src/lib/purgeUnusedStyles.js
+++ b/src/lib/purgeUnusedStyles.js
@@ -86,7 +86,7 @@ export default function purgeUnusedUtilities(config) {
         const broadMatches = content.match(/[^<>"'`\s]*[^<>"'`\s:]/g) || []
 
         // Capture classes within other delimiters like .block(class="w-1/2") in Pug
-        const innerMatches = content.match(/[^<>"'`\s.(){}\[\]#=%]*[^<>"'`\s.(){}\[\]#=%:]/g) || []
+        const innerMatches = content.match(/[^<>"'`\s.(){}[\]#=%]*[^<>"'`\s.(){}[\]#=%:]/g) || []
 
         return broadMatches.concat(innerMatches)
       },