diff --git a/requirements.txt b/requirements.txt
index b8f21a6fe907015613f7ca17c544700010b15654..162a8755388877c677fdb7aa140908166df3bc11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ PyYAML
 #wsgiref
 six
 requests
-pysnmp
+pysnmp<=5.1.0
 ply
 ipaddress
 idna