diff --git a/awx/ui/client/src/templates/job_templates/edit-job-template/job-template-edit.controller.js b/awx/ui/client/src/templates/job_templates/edit-job-template/job-template-edit.controller.js
index 435a938a51..d27282d162 100644
--- a/awx/ui/client/src/templates/job_templates/edit-job-template/job-template-edit.controller.js
+++ b/awx/ui/client/src/templates/job_templates/edit-job-template/job-template-edit.controller.js
@@ -192,7 +192,7 @@ export default
                     const newServiceValue = newValue && typeof newValue === 'object' ? newValue.value : newValue;
                     const oldServiceValue = oldValue && typeof oldValue === 'object' ? oldValue.value : oldValue;
                     if (newServiceValue) {
-                        $scope.webhook_url = `${$scope.callback_server_path}${jobTemplateData.url}${newServiceValue}`;
+                        $scope.webhook_url = `${$scope.callback_server_path}${jobTemplateData.url}${newServiceValue}/`;
                     } else {
                         $scope.webhook_url = '';
                         $scope.webhook_key = '';
diff --git a/awx/ui/client/src/templates/workflows/edit-workflow/workflow-edit.controller.js b/awx/ui/client/src/templates/workflows/edit-workflow/workflow-edit.controller.js
index be92706f4d..45b7b95c52 100644
--- a/awx/ui/client/src/templates/workflows/edit-workflow/workflow-edit.controller.js
+++ b/awx/ui/client/src/templates/workflows/edit-workflow/workflow-edit.controller.js
@@ -200,7 +200,7 @@ export default [
             const newServiceValue = newValue && typeof newValue === 'object' ? newValue.value : newValue;
             const oldServiceValue = oldValue && typeof oldValue === 'object' ? oldValue.value : oldValue;
             if (newServiceValue) {
-                $scope.webhook_url = `${$scope.baseURL}${workflowJobTemplateData.url}${newServiceValue}`;
+                $scope.webhook_url = `${$scope.baseURL}${workflowJobTemplateData.url}${newServiceValue}/`;
                 $scope.enable_webhook = true;
             } else {
                 $scope.webhook_url = '';