diff --git a/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb b/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
index cda797b1a..4d3bf7738 100644
--- a/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
+++ b/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
@@ -6,7 +6,7 @@ on:
     <% node.input_values.each_key do |key| %>
     <%=key %>:
       <% if node.input_values[key].blank? %>
-      - *
+      - '*'
       <% else %>
         <% node.input_values[key].to_s.split(",").each do |val| %>
       - <%=val %>
@@ -19,10 +19,10 @@ on:
     <% node.input_values.each_key do |key| %>
     <%=key %>:
       <% if node.input_values[key].blank? %>
-    - *
+      - '*'
       <% else %>
         <% node.input_values[key].to_s.split(",").each do |val| %>
-    - <%=val %>
+      - <%=val %>
         <% end %>
       <% end %>
     <% end %>