diff --git a/requirements.txt b/requirements.txt
index a9b2ea6c..4717b209 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ pysnmp
 tornado
 pysnmp-lextudio==5.0.34
 snmpsim-lextudio==1.0.5
-pyasn1==0.6.0
+pyasn1==0.6.3
 pysnmp-mibs
 server_common@git+https://github.com/ISISComputingGroup/server_common.git
 ibex-non-ca-helpers