diff --git a/requirements.txt b/requirements.txt
index 071e358d3..883b2ccdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ keystonemiddleware>=4.12.0 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0
 voluptuous>=0.8.9 # BSD License
 sympy>=0.7.6 # BSD
-pysnmp>=4.2.3 # BSD
+pysnmp!=4.3.4,!=4.3.5,!=4.3.6,!=4.3.7,>=4.2.3 # BSD
 PyJWT>=1.0.1 # MIT
 osprofiler>=1.4.0 # Apache-2.0
 
diff --git a/test-requirements.txt b/test-requirements.txt
index 965da87df..cb35c84ac 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -30,7 +30,7 @@ stevedore>=1.20.0 # Apache-2.0
 voluptuous>=0.8.9 # BSD License
 sympy>=0.7.6 # BSD
 reno!=2.3.1,>=1.8.0 # Apache-2.0
-pysnmp>=4.2.3 # BSD
+pysnmp!=4.3.4,!=4.3.5,!=4.3.6,!=4.3.7,>=4.2.3 # BSD
 
 # Doc requirements
 openstackdocstheme>=1.11.0 # Apache-2.0