diff --git a/setup.py b/setup.py
index a62c4bcf..984f73e6 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ class SdistCmd(sdist):
         except ImportError:
             pass
         else:
-            with open('src/network/bootstrap_servers.list', 'wb') as dst:
+            with open('src/network/bootstrap_servers.list', 'w') as dst:
                 for peer in enumerate_bootstrap_servers():
                     dst.write('{0}, {1}\n'.format(*peer))
         return sdist.run(self)