diff --git a/homeassistant/components/device_tracker/snmp.py b/homeassistant/components/device_tracker/snmp.py
index f6df3f0a509..9981b4d7ca6 100644
--- a/homeassistant/components/device_tracker/snmp.py
+++ b/homeassistant/components/device_tracker/snmp.py
@@ -18,7 +18,7 @@ from homeassistant.util import Throttle
 MIN_TIME_BETWEEN_SCANS = timedelta(seconds=10)
 
 _LOGGER = logging.getLogger(__name__)
-REQUIREMENTS = ['pysnmp==4.2.5']
+REQUIREMENTS = ['pysnmp==4.3.2']
 
 CONF_COMMUNITY = "community"
 CONF_BASEOID = "baseoid"
@@ -72,7 +72,7 @@ class SnmpScanner(object):
 
     @Throttle(MIN_TIME_BETWEEN_SCANS)
     def _update_info(self):
-        """Ensure the information from the WAP is up to date.
+        """Ensure the information from the device is up to date.
 
         Return boolean if scanning successful.
         """
@@ -88,7 +88,7 @@ class SnmpScanner(object):
             return True
 
     def get_snmp_data(self):
-        """Fetch MAC addresses from WAP via SNMP."""
+        """Fetch MAC addresses from access point via SNMP."""
         devices = []
 
         errindication, errstatus, errindex, restable = self.snmp.nextCmd(
@@ -97,9 +97,10 @@ class SnmpScanner(object):
         if errindication:
             _LOGGER.error("SNMPLIB error: %s", errindication)
             return
+        # pylint: disable=no-member
         if errstatus:
             _LOGGER.error('SNMP error: %s at %s', errstatus.prettyPrint(),
-                          errindex and restable[-1][int(errindex)-1] or '?')
+                          errindex and restable[int(errindex) - 1][0] or '?')
             return
 
         for resrow in restable:
diff --git a/requirements_all.txt b/requirements_all.txt
index ccd4ac83970..6decd570696 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -262,7 +262,7 @@ pyowm==2.3.1
 pyserial<=3.0
 
 # homeassistant.components.device_tracker.snmp
-pysnmp==4.2.5
+pysnmp==4.3.2
 
 # homeassistant.components.sensor.forecast
 python-forecastio==1.3.4