diff --git a/case_studies/mmt/requirements.txt b/case_studies/mmt/requirements.txt
index fea6967..5a23f52 100644
--- a/case_studies/mmt/requirements.txt
+++ b/case_studies/mmt/requirements.txt
@@ -13,7 +13,7 @@ chardet==3.0.4
 cleverhans==2.1.0
 Click==7.0
 cloudpickle==0.6.1
-configobj==5.0.6
+configobj==5.0.9
 configparser==3.5.0
 cryptography==1.2.3
 cycler==0.10.0