diff --git a/app/views/projects/_project_detail.json.jbuilder b/app/views/projects/_project_detail.json.jbuilder
index 94aee427e..d0b62aaa3 100644
--- a/app/views/projects/_project_detail.json.jbuilder
+++ b/app/views/projects/_project_detail.json.jbuilder
@@ -26,7 +26,7 @@ json.author do
     json.name user.try(:show_real_name)
     json.type user&.type
     json.login user.login
-    json.image_url render_avatar_url(user)
+    json.image_url url_to_avatar(user)
   end
 end
 
diff --git a/app/views/projects/index.json.jbuilder b/app/views/projects/index.json.jbuilder
index 0e23ac03d..96ab89c00 100644
--- a/app/views/projects/index.json.jbuilder
+++ b/app/views/projects/index.json.jbuilder
@@ -28,7 +28,7 @@ json.projects @projects do |project|
       json.type user.type
       json.name user.try(:show_real_name)
       json.login user.login
-      json.image_url render_avatar_url(user)
+      json.image_url url_to_avatar(user)
     end
   end