diff --git a/setup.cfg b/setup.cfg
index 8aa3835..f49cd0d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -60,7 +60,7 @@ install_requires =
 [options.extras_require]
 train =
   fisher ~=0.1.10
-  statsmodels ~=0.14.0
+  statsmodels >=0.13,<0.15
 
 [options.packages.find]
 include =