diff --git a/etc/requirements_dev.txt b/etc/requirements_dev.txt
index 42923384..0c082fd1 100644
--- a/etc/requirements_dev.txt
+++ b/etc/requirements_dev.txt
@@ -16,5 +16,5 @@ pyandoc==0.0.1
 # Example scripts that are run during unit tests use the following:
 
 matplotlib==1.2.1
-statsmodels==0.5.0
+statsmodels==0.4.3
 patsy==0.1.0