diff --git a/gitosis/init.py b/gitosis/init.py
index 87ad9a7..28e7871 100644
--- a/gitosis/init.py
+++ b/gitosis/init.py
@@ -77,6 +77,11 @@ def init_admin_repository(
     repository.init(
         path=git_dir,
         )
+
+    # can't rely on setuptools and all kinds of distro packaging to
+    # have kept our templates executable, it seems
+    os.chmod(os.path.join(git_dir, 'hooks', 'post-update'), 0755)
+
     if not repository.has_initial_commit(git_dir):
         log.info('Making initial commit...')
         # ConfigParser does not guarantee order, so jump through hoops
diff --git a/gitosis/test/test_repository.py b/gitosis/test/test_repository.py
index 14c6764..1646e6c 100644
--- a/gitosis/test/test_repository.py
+++ b/gitosis/test/test_repository.py
@@ -51,6 +51,10 @@ def test_init_templates():
         os.path.dirname(__file__),
         'mocktemplates',
         )
+
+    # for reproducibility
+    os.umask(0022)
+
     repository.init(path, template=templatedir)
     repository.init(path)
     got = readFile(os.path.join(path, 'no-confusion'))