diff --git a/etc/requirements_dev.txt b/etc/requirements_dev.txt
index 598fcab3..3e5226e0 100644
--- a/etc/requirements_dev.txt
+++ b/etc/requirements_dev.txt
@@ -21,7 +21,7 @@ pyandoc==0.0.1
 
 matplotlib==1.3.1
 # tornado and pyparsing are required by matplotlib
-tornado==3.2
+tornado==3.2.1
 pyparsing==2.0.2
 
 Markdown==2.4.1