diff --git a/app/portainer/helpers/stackHelper.js b/app/portainer/helpers/stackHelper.js
index b8e2fb6b2..1e3b041b8 100644
--- a/app/portainer/helpers/stackHelper.js
+++ b/app/portainer/helpers/stackHelper.js
@@ -33,7 +33,7 @@ function validateYAML(yaml, containerNames, originalContainersNames = []) {
   let yamlObject;
 
   try {
-    yamlObject = YAML.parse(yaml, { mapAsMap: true });
+    yamlObject = YAML.parse(yaml, { mapAsMap: true, maxAliasCount: 10000 });
   } catch (err) {
     return 'There is an error in the yaml syntax: ' + err;
   }
@@ -58,7 +58,7 @@ export function extractContainerNames(yaml = '') {
   let yamlObject;
 
   try {
-    yamlObject = YAML.parse(yaml);
+    yamlObject = YAML.parse(yaml, { maxAliasCount: 10000 });
   } catch (err) {
     return [];
   }