diff --git a/config.sample.json b/config.sample.json
index bf5da247d5..c9b3d65b0f 100644
--- a/config.sample.json
+++ b/config.sample.json
@@ -12,7 +12,7 @@
         ]
     },
     "piwik": {
-        "url": "//piwik.riot.im/",
+        "url": "https://piwik.riot.im/",
         "siteId": 1
     }
 }
diff --git a/electron_app/riot.im/config.json b/electron_app/riot.im/config.json
index 023e6a02e6..1303985ecd 100644
--- a/electron_app/riot.im/config.json
+++ b/electron_app/riot.im/config.json
@@ -14,7 +14,7 @@
         ]
     },
     "piwik": {
-        "url": "//piwik.riot.im/",
+        "url": "https://piwik.riot.im/",
         "siteId": 1
     }
 }