diff --git a/lib/lists.js b/lib/lists.js
index 35cd348..c1bd478 100644
--- a/lib/lists.js
+++ b/lib/lists.js
@@ -29,7 +29,7 @@
 			})
 			.map(function(entry){
 				var regExp;
-				var domain = !!entry.match(/^[\w.]+$/);
+				var domain = !!entry.match(/^[A-Za-z0-9_.-]+$/);
 				if (domain){
 					regExp = new RegExp("(?:^|\\.)" + entry.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "\\.?$", "i");
 				}
diff --git a/lib/settings.js b/lib/settings.js
index 5f10b62..8a86db7 100644
--- a/lib/settings.js
+++ b/lib/settings.js
@@ -461,7 +461,7 @@
 		urlContainer.on(function({newValue, oldValue}){
 			newValue.forEach(function(urlSetting){
 				var regExp;
-				var domain = !!urlSetting.url.match(/^[\w.]+$/);
+				var domain = !!urlSetting.url.match(/^[A-Za-z0-9_.-]+$/);
 				if (domain){
 					regExp = new RegExp(
 						"(?:^|\\.)" + urlSetting.url.replace(/([\\+*?[^\]$(){}=!|.])/g, "\\$1") + "\\.?$",