diff --git a/.travis.yml b/.travis.yml
index c0ef8ccba..554902cfc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ install:
 # RDFLib requres html5lib;  html5lib requires setuptools version 18.5 or above;
   - pip install setuptools==25.1.0
   - python setup.py sdist
-  - pip install dist/ga4gh*.tar.gz
+  - pip install dist/ga4gh*.tar.gz -c constraints.txt
 # every installable in setup.py's entry_points should be tested here
   - ga4gh_configtest --version
   - ga4gh_server --version
diff --git a/dev-requirements.txt b/dev-requirements.txt
index d4b14f660..c70694c1e 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,7 +1,7 @@
 # This file lists the requirements needed to develop on ga4gh/server.
 
 # Include the requirements.txt file
--r requirements.txt
+-r requirements.txt -c constraints.txt
 
 ### This section is for dependencies of the libraries ###
 # these libraries are the set listed by pipdeptree -f -w