diff --git a/.travis.yml b/.travis.yml
index c2181a9..b854ff3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 dist: xenial  # required for Python >= 3.7
 language: python
+cache: pip
 python:
   - "3.5"
   - "3.6"