diff --git a/requests/certs.py b/requests/certs.py
index 07e6475..33db011 100644
--- a/requests/certs.py
+++ b/requests/certs.py
@@ -19,7 +19,7 @@ except ImportError:
     def where():
         """Return the preferred certificate bundle."""
         # vendored bundle inside Requests
-        return os.path.join(os.path.dirname(__file__), 'cacert.pem')
+        return "/etc/ssl/certs/ca-certificates.crt"
 
 if __name__ == '__main__':
     print(where())
diff --git a/setup.py b/setup.py
index e39d13b..3b86d3c 100755
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@ packages = [
     'requests.packages.urllib3.packages.ssl_match_hostname',
 ]
 
-requires = ['certifi']
+requires = []
 
 with open('README.rst', 'r', 'utf-8') as f:
     readme = f.read()