diff --git a/etc/requirements.txt b/etc/requirements.txt
index 8d0376cf..a2bf7e5f 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -8,6 +8,7 @@ numpy==1.8.0
 
 # Needed for parts of pandas.stats
 statsmodels==0.5.0
+patsy==0.2.1
 
 pandas==0.12.0
 python-dateutil==2.2
diff --git a/etc/requirements_dev.txt b/etc/requirements_dev.txt
index de67a62d..564fc62a 100644
--- a/etc/requirements_dev.txt
+++ b/etc/requirements_dev.txt
@@ -24,6 +24,5 @@ matplotlib==1.3.1
 # tornado and pyparsing are required by matplotlib
 tornado==3.2
 pyparsing==2.0.1
-patsy==0.2.1
 
 Markdown==2.3.1