diff --git a/.travis.yml b/.travis.yml
index d7cbcc96..b3352c70 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ python:
   # - "pypy"  -- appears to hang
   # - "pypy3"
 # command to install dependencies
-install: "pip install git+https://github.com/kennethreitz/pipenv.git; pipenv install --dev --system"
+install: "make"
 # command to run tests
 script:
   - make coverage
diff --git a/Makefile b/Makefile
index 7da216b4..86251957 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .PHONY: docs
 
 init:
-	pip install pipenv>=0.1.6
+	pip install 'pipenv>=0.1.6'
 	pipenv install --dev
 
 test:
@@ -10,7 +10,7 @@ test:
 	pipenv run py.test tests
 
 coverage:
-	py.test --cov-config .coveragerc --verbose --cov-report term --cov-report xml --cov=requests tests
+	pipenv run py.test --cov-config .coveragerc --verbose --cov-report term --cov-report xml --cov=requests tests
 
 certs:
 	curl http://ci.kennethreitz.org/job/ca-bundle/lastSuccessfulBuild/artifact/cacerts.pem -o requests/cacert.pem