diff --git a/ProceduralParts-v0.9.21.ckan b/ProceduralParts-v0.9.21.ckan
index d11496f43a..a9683d7a4a 100644
--- a/ProceduralParts-v0.9.21.ckan
+++ b/ProceduralParts-v0.9.21.ckan
@@ -5,6 +5,11 @@
   "abstract": "ProceduralParts allows you to procedurally generate a number of different parts in a range of sizes and shapes.",
   "license": "CC-BY-3.0",
   "ksp_version": "0.90",
+  "recommends": [
+    {
+      "name": "ModuleManager"
+    }
+  ],
   "suggests": [
     {
       "name": "PPTextures"