diff --git a/Graphotron/Graphotron-0.4.3.0.ckan b/Graphotron/Graphotron-0.4.3.0.ckan
index c73f3c797a..756b1e6759 100644
--- a/Graphotron/Graphotron-0.4.3.0.ckan
+++ b/Graphotron/Graphotron-0.4.3.0.ckan
@@ -21,7 +21,7 @@
             "install_to": "GameData"
         }
     ],
-    "download": "http://www.kerbaltek.com/_downloads/graphotron/Graphotron-0.4.3_for-KSP-1.3.zip",
+    "download": "https://www.kerbaltek.com/_downloads/graphotron/Graphotron-0.4.3_for-KSP-1.3.zip",
     "download_size": 63813,
     "download_hash": {
         "sha1": "41AC46A31F3461DB8F6AEFC3ED237728BFB5AC5F",