diff --git a/requirements.txt b/requirements.txt
index 12674308..edfed25b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,9 @@ oslo.utils>=3.20.0 # Apache-2.0
 jsonschema>=2.6.0 # MIT
 requests!=2.12.2,!=2.13.0,>=2.10.0 # Apache-2.0
 retrying!=1.3.0,>=1.2.3 # Apache-2.0
-pysnmp>=4.2.3,<5.0.0  # BSD
+pysnmp-lextudio>=5.0.0 # BSD
+pyasn1>=0.5.1 # BSD
+pyasn1-modules>=0.3.0 # BSD
 
 # Redfish communication uses the Sushy library
 sushy>=4.5.0