diff --git a/python-aiohttp.spec b/python-aiohttp.spec
index ee437c9..b1ee0c8 100644
--- a/python-aiohttp.spec
+++ b/python-aiohttp.spec
@@ -29,7 +29,7 @@ Source:         https://files.pythonhosted.org/packages/source/a/aiohttp/aiohttp
 # PATCH-FIX-UPSTREAM mcepl@suse.com -- Fix failing tests due to invalid escapes in regexps
 # https://github.com/aio-libs/aiohttp/issues/3325
 Patch0:         invalid-escapes-in-tests.patch
-BuildRequires:  %{python_module Cython >= 0.28.4} 
+BuildRequires:  %{python_module Cython >= 0.28.4}
 BuildRequires:  %{python_module devel >= 3.5.3}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes