diff --git a/repositories.json b/repositories.json
index f6cc582bc6..798b0813af 100644
--- a/repositories.json
+++ b/repositories.json
@@ -2,42 +2,42 @@
     "repositories": [
         {
             "name":      "default",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta/archive/master.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta/archive/master.tar.gz",
             "x_mirror":  true,
             "x_comment": "The well-known default CKAN metadata repository"
         },
 
         {
             "name":      "dev",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/master.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/master.tar.gz",
             "x_mirror":  false,
             "x_comment": "Development ckans"
         },
 
         {
             "name":      "MechJeb2-dev",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/MechJeb2-ci.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/MechJeb2-ci.tar.gz",
             "x_mirror":  false,
             "x_comment": "MechJeb2 Development (prerelease and Jenkins) ckans"
         },
 
         {
             "name":      "RemoteTech-pre",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/RemoteTech-pre.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/RemoteTech-pre.tar.gz",
             "x_mirror":  false,
             "x_comment": "RemoteTech Development (prerelease and Jenkins) ckans"
         },
 
         {
             "name":      "SCANsat-pre",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/SCANsat-pre.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/SCANsat-pre.tar.gz",
             "x_mirror":  false,
             "x_comment": "SCANsat Development (prerelease and Jenkins) ckans"
         },
 
         {
             "name":      "Trajectories-pre",
-            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/SCANsat-pre.zip",
+            "uri":       "https://github.com/KSP-CKAN/CKAN-meta-dev/archive/SCANsat-pre.tar.gz",
             "x_mirror":  false,
             "x_comment": "Trajectories Development (prerelease and Jenkins) ckans"
         }