diff --git a/statistical_mechanics/requirements.txt b/statistical_mechanics/requirements.txt
index 56c2fd0..fad157b 100644
--- a/statistical_mechanics/requirements.txt
+++ b/statistical_mechanics/requirements.txt
@@ -1,5 +1,5 @@
 apptools==4.5.0
-configobj==5.0.6
+configobj==5.0.9
 cycler==0.10.0
 envisage==5.0.0
 kiwisolver==1.3.1