diff --git a/lib/microwaveprop/commercial/snmp_client.ex b/lib/microwaveprop/commercial/snmp_client.ex
index 1a97cc20..558e490e 100644
--- a/lib/microwaveprop/commercial/snmp_client.ex
+++ b/lib/microwaveprop/commercial/snmp_client.ex
@@ -54,7 +54,7 @@ defmodule Microwaveprop.Commercial.SnmpClient do
 
   def poll_af11x(host, community) do
     oids = Map.keys(@af11x_oids)
-    args = ["-v2c", "-c", community, "-t", "5", "-r", "1", host | oids]
+    args = ["-v1", "-c", community, "-t", "5", "-r", "1", host | oids]
 
     case run_cmd("snmpget", args) do
       {output, 0} ->
@@ -69,10 +69,10 @@ defmodule Microwaveprop.Commercial.SnmpClient do
 
   def poll_af60(host, community) do
     static_oids = Map.keys(@af60_static_oids)
-    static_args = ["-v2c", "-c", community, "-t", "5", "-r", "1", host | static_oids]
+    static_args = ["-v1", "-c", community, "-t", "5", "-r", "1", host | static_oids]
 
     station_oids = Enum.map(Map.keys(@af60_station_cols), &"#{@af60_base}.3.1.#{&1}")
-    station_args = ["-v2c", "-c", community, "-t", "5", "-r", "1", host | station_oids]
+    station_args = ["-v1", "-c", community, "-t", "5", "-r", "1", host | station_oids]
 
     with {static_out, 0} <- run_cmd("snmpget", static_args),
          {station_out, 0} <- run_cmd("snmpgetnext", station_args) do