diff --git a/third_party/py/googlestorage/publish_release.py b/third_party/py/googlestorage/publish_release.py
index 9628499c3d8e4..2cfdef98ee57c 100644
--- a/third_party/py/googlestorage/publish_release.py
+++ b/third_party/py/googlestorage/publish_release.py
@@ -88,6 +88,7 @@
 OAUTH_CREDENTIALS_FILE = '.credentials.dat'
 OAUTH_SCOPE = 'https://www.googleapis.com/auth/devstorage.full_control'
 
+mimetypes.add_type("application/java-archive", ".jar")
 
 class Error(Exception):
     def __init__(self, status, message):