diff --git a/modules/welectBidAdapter.js b/modules/welectBidAdapter.js
index f9fc57a4834..467b628c944 100644
--- a/modules/welectBidAdapter.js
+++ b/modules/welectBidAdapter.js
@@ -38,7 +38,7 @@ export const spec = {
 
       let domain = bidRequest.params.domain || DEFAULT_DOMAIN;
 
-      let url = `https://${domain}/api/v2/preflight/by_alias/${bidRequest.params.placementId}`;
+      let url = `https://${domain}/api/v2/preflight/${bidRequest.params.placementId}`;
 
       let gdprConsent = null;
 
diff --git a/test/spec/modules/welectBidAdapter_spec.js b/test/spec/modules/welectBidAdapter_spec.js
index 5f047904c76..571f68038ac 100644
--- a/test/spec/modules/welectBidAdapter_spec.js
+++ b/test/spec/modules/welectBidAdapter_spec.js
@@ -103,7 +103,7 @@ describe('WelectAdapter', function () {
     // Formatted requets
     let request1 = {
       method: 'POST',
-      url: 'https://www.welect.de/api/v2/preflight/by_alias/exampleAlias',
+      url: 'https://www.welect.de/api/v2/preflight/exampleAlias',
       data: data1,
       options: {
         contentType: 'application/json',
@@ -114,7 +114,7 @@ describe('WelectAdapter', function () {
 
     let request2 = {
       method: 'POST',
-      url: 'https://www.welect2.de/api/v2/preflight/by_alias/exampleAlias',
+      url: 'https://www.welect2.de/api/v2/preflight/exampleAlias',
       data: data2,
       options: {
         contentType: 'application/json',
@@ -171,7 +171,7 @@ describe('WelectAdapter', function () {
         }
       },
       method: 'POST',
-      url: 'https://www.welect.de/api/v2/preflight/by_alias/exampleAlias',
+      url: 'https://www.welect.de/api/v2/preflight/exampleAlias',
       options: {
         contentType: 'application/json',
         withCredentials: false,