diff --git a/SolarSailNavigator/SolarSailNavigator-v1.0.3-alpha.ckan b/SolarSailNavigator/SolarSailNavigator-v1.0.3-alpha.ckan
index 11e9479b8f..5c54e2942b 100644
--- a/SolarSailNavigator/SolarSailNavigator-v1.0.3-alpha.ckan
+++ b/SolarSailNavigator/SolarSailNavigator-v1.0.3-alpha.ckan
@@ -3,6 +3,11 @@
     "identifier": "SolarSailNavigator",
     "spec_version": 1,
     "license": "unrestricted",
+    "depends": [
+        {
+            "name": "ModuleManager"
+        }
+    ],
     "ksp_version": "1.0.4",
     "name": "SolarSailNavigator",
     "abstract": "Navigate continuous thrust spacecraft like solar sails and ion engines throughout the KSP solar system",