diff --git a/requirements.txt b/requirements.txt
index af586a2..eba5a3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mypy-extensions==0.4.1
 networkx==2.3
 nose==1.3.7
 prov==1.5.1
-psutil==5.6.3
+psutil==5.6.6
 pyparsing==2.4.0
 python-dateutil==2.8.0
 PyYAML==5.1