diff --git a/master.cfg b/master.cfg
index c2ee800..ab04c92 100644
--- a/master.cfg
+++ b/master.cfg
@@ -235,7 +235,7 @@ def generic_builder(id, branch='', rsync=False):
         f.addStep(FileUpload(name='upload',
                              workersrc='buildbot_upload.zip',
                              masterdest=filename,
-                             maxsize=200 * 1024 * 1024,
+                             maxsize=500 * 1024 * 1024,
                              workdir='install'))
     f.addStep(MasterShellCommand(name='unpack',
                                  command=['python3.6',