diff --git a/server/src/middleware/validatescripting.js b/server/src/middleware/validatescripting.js
index 4f7be45..77d7451 100644
--- a/server/src/middleware/validatescripting.js
+++ b/server/src/middleware/validatescripting.js
@@ -9,7 +9,18 @@ import { getText } from '../util/text.js';
 
 export const validateScripting = (request, response, next) => {
   const testDomain = nconf.get('validTestDomains');
-  const validRegEx = new RegExp(testDomain);
+  let validRegEx;
+  try {
+    validRegEx = new RegExp(testDomain);
+  } catch (error) {
+    log.error('Could not use regular expression', error);
+    request.inputValidationError = getText(
+      'error.nonmatchingdomain',
+      '',
+      testDomain
+    );
+    return next();
+  }
 
   if (request.body.scripting) {
     try {
diff --git a/server/src/middleware/validateurl.js b/server/src/middleware/validateurl.js
index bc43aee..c39c6ea 100644
--- a/server/src/middleware/validateurl.js
+++ b/server/src/middleware/validateurl.js
@@ -11,7 +11,7 @@ const logger = log.getLogger('sitespeedio.server');
 
 export const validateURL = (request, response, next) => {
   const testDomain = nconf.get('validTestDomains');
-  const validRegEx = new RegExp(testDomain);
+
   // From the web or the API
   let url = request.body.url;
 
@@ -31,19 +31,29 @@ export const validateURL = (request, response, next) => {
     }
 
     const urlObject = new URL(url);
-    if (!validRegEx.test(urlObject.hostname)) {
-      logger.error(
-        'Non valid domain %s matching regex for url %s',
-        urlObject.hostname,
-        url
-      );
+    try {
+      const validRegEx = new RegExp(testDomain);
+      if (!validRegEx.test(urlObject.hostname)) {
+        logger.error(
+          'Non valid domain %s matching regex for url %s',
+          urlObject.hostname,
+          url
+        );
+        request.inputValidationError = getText(
+          'error.nonmatchingdomain',
+          url,
+          testDomain
+        );
+
+        return next();
+      }
+    } catch (error) {
+      log.error('Could not use the regular expression', error);
       request.inputValidationError = getText(
         'error.nonmatchingdomain',
         url,
         testDomain
       );
-
-      return next();
     }
   }
   next();