diff --git a/lib/helpers/is_bearer_header_only_error.js b/lib/helpers/is_bearer_header_only_error.js
index 056125b9..1875d744 100644
--- a/lib/helpers/is_bearer_header_only_error.js
+++ b/lib/helpers/is_bearer_header_only_error.js
@@ -1,4 +1,4 @@
-const REGEXP = /((?:[a-zA-Z0-9._~+/-]+=*(?:\s+|$))|[^()<>@,;:\\"/?={}[\] ]+)(?:=([^\\"=\s,]+|"(?:[^"\\]|\\.)*"))?/g;
+const REGEXP = /(\w+)=("[^"]*")/g;
 const NOPE = [false];
 
 module.exports = function isBearerHeaderOnlyError(error) {