diff --git a/app/assets/js/processbuilder.js b/app/assets/js/processbuilder.js
index 4ebe86d..fa55143 100644
--- a/app/assets/js/processbuilder.js
+++ b/app/assets/js/processbuilder.js
@@ -505,6 +505,9 @@ class ProcessBuilder {
                     case 'user_type':
                         val = 'mojang'
                         break
+                    case 'user_properties':
+                        val = "{}"
+                        break
                     case 'version_type':
                         val = this.versionData.type
                         break