diff --git a/annotator_models/requirements.txt b/annotator_models/requirements.txt
index 88bfea50..5a31829a 100644
--- a/annotator_models/requirements.txt
+++ b/annotator_models/requirements.txt
@@ -62,7 +62,7 @@ proto-google-cloud-error-reporting-v1beta1==0.15.3
 proto-google-cloud-logging-v2==0.91.3
 protobuf==3.18.3
 psutil==5.6.6
-pyasn1==0.4.2
+pyasn1==0.6.3
 pyasn1-modules==0.2.1
 python-dateutil==2.7.2
 pytz==2018.3