diff --git a/tox.ini b/tox.ini
index 5ce3286d..730baa66 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,7 @@ deps =
     pytest-asyncio<0.22.0
     pytest-cov
     pytest-timeout
-    snmpsim>=1.0
+    snmpsim>=1.0,<1.1.6
     retry
 
 setenv =