diff --git a/.travis.yml b/.travis.yml
index a4576f96..26c159b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ python:
   # - "pypy"  -- appears to hang
   # - "pypy3"
 # command to install dependencies
-install: "pip install -r requirements.txt"
+install: "pip install pipenv; pipenv install"
 # command to run tests
 script:
   - make coverage