diff --git a/lib/index.js b/lib/index.js
index af1584a..28620be 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -49,7 +49,7 @@ class ReplaceText {
 		const vals = this.values;
 		const pats = this.patterns;
 		const keys = Object.keys(vals).filter(k => !/[ex,in]clude|patterns/.test(k));
-		const RGXP = new RegExp(keys.join('|'), 'g');
+		const RGXP = new RegExp(keys.map(k => k.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&")).join('|'), 'g');
 		const isMatch = this.isMatch;
 
 		compiler.plugin('compilation', bundle => {