diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 000000000..8ee231a1c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "telegram/vendor/urllib3"]
+	path = telegram/vendor/urllib3
+	url = https://github.com/python-telegram-bot/urllib3.git
+	branch = ptb
diff --git a/telegram/vendor/urllib3 b/telegram/vendor/urllib3
new file mode 160000
index 000000000..4b076eedf
--- /dev/null
+++ b/telegram/vendor/urllib3
@@ -0,0 +1 @@
+Subproject commit 4b076eedffc1afabf0215ced3820603de73d1ce7