diff --git a/.travis/install_urllib3.sh b/.travis/install_urllib3.sh
index 48ec04b..1324ded 100755
--- a/.travis/install_urllib3.sh
+++ b/.travis/install_urllib3.sh
@@ -3,6 +3,6 @@
 set -e
 set -x
 
-git clone https://github.com/shazow/urllib3.git
+git clone --depth 1 https://github.com/shazow/urllib3.git
 pip install -r ./urllib3/dev-requirements.txt
 pip install ./urllib3[socks]