diff --git a/requests/packages/urllib3/poolmanager.py b/requests/packages/urllib3/poolmanager.py
index d5b7613c..8d915ad5 100644
--- a/requests/packages/urllib3/poolmanager.py
+++ b/requests/packages/urllib3/poolmanager.py
@@ -15,7 +15,7 @@ pool_classes_by_scheme = {
 
 port_by_scheme = {
     'http': 80,
-    'https': 433,
+    'https': 443,
 }