diff --git a/pipenv/utils.py b/pipenv/utils.py
index f65c2dd7..e2ba41f5 100644
--- a/pipenv/utils.py
+++ b/pipenv/utils.py
@@ -111,5 +111,5 @@ def convert_deps_to_pip(deps, r=True):
 
     # Write requirements.txt to tmp directory.
     f = tempfile.NamedTemporaryFile(suffix='-requirements.txt', delete=False)
-    f.write('\n'.join(dependencies))
+    f.write('\n'.join(dependencies).decode('utf-8'))
     return f.name