diff --git a/authn-service/requirements.txt b/authn-service/requirements.txt
index 4ee4fc1..79bb61f 100644
--- a/authn-service/requirements.txt
+++ b/authn-service/requirements.txt
@@ -1,4 +1,4 @@
-asn1crypto==0.24.0
+asn1crypto==1.5.1
 certifi==2020.6.20
 chardet==3.0.4
 click==7.1.2