diff --git a/opendr/utils.py b/opendr/utils.py
index 843b470..a248056 100644
--- a/opendr/utils.py
+++ b/opendr/utils.py
@@ -34,4 +34,4 @@ def wget(url, dest_fname=None):
         contents = urlopen(url).read()
     except:
         raise Exception('Unable to get url: %s' % (url,))
-    open(dest_fname, 'w').write(contents)
+    open(dest_fname, 'wb').write(contents)