diff --git a/.deploy/create_release.py b/.deploy/create_release.py
index da700e87..19031bb3 100755
--- a/.deploy/create_release.py
+++ b/.deploy/create_release.py
@@ -150,13 +150,20 @@ def main():
     for release_file in release_files:
         _, filename=os.path.split(release_file)
         headers['Content-Type']='text/plain'
+#        headers['Transfer-Encoding']='gzip'
         url='{release_url}?name={filename}'.format(release_url=release['upload_url'][:-13], filename=filename)
         print('Upload to {}'.format(url))
 
         with open(release_file, 'rb') as f:
             conn.request('POST', url, f, headers)
 
-        conn.getresponse().read()
+        response = conn.getresponse()
+        result = response.read()
+        if response.status != 201:
+            print('Failed to upload filename {filename}'.format(filename=filename))
+            print('Github API replied:')
+            print('{} {}'.format(response.status, response.reason))
+            print(repr(json.loads(result.decode())))
 
 
 if __name__ == "__main__":
diff --git a/.travis.yml b/.travis.yml
index 6b61df9f..a3cefb83 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 language: python
 
 python:
-  - 3.6
+  - 3.5
 
 # run on Travis container-based infrastructure
 dist: trusty