diff --git a/etc/requirements_dev.txt b/etc/requirements_dev.txt
index b4895bda..0d33ec34 100644
--- a/etc/requirements_dev.txt
+++ b/etc/requirements_dev.txt
@@ -19,6 +19,9 @@ pyandoc==0.0.1
 # Example scripts that are run during unit tests use the following:
 
 scipy==0.12.0
-matplotlib==1.2.1
+matplotlib==1.3.0
+# tornado and pyparsing are required by matplotlib
+tornado==3.1
+pyparsing==2.0.1
 statsmodels==0.4.3
 patsy==0.1.0