diff --git a/legacy/requirements.txt b/legacy/requirements.txt
index fd5b57e..d839d8c 100644
--- a/legacy/requirements.txt
+++ b/legacy/requirements.txt
@@ -47,7 +47,7 @@ proto-google-cloud-datastore-v1==0.90.4
 proto-google-cloud-error-reporting-v1beta1==0.15.3
 proto-google-cloud-logging-v2==0.91.3
 protobuf==3.5.1
-psutil==5.4.3
+psutil==5.6.6
 pyasn1==0.4.2
 pyasn1-modules==0.2.1
 pytz==2018.3