Upgrade psutil to 5.4.3
diff --git a/homeassistant/components/sensor/systemmonitor.py b/homeassistant/components/sensor/systemmonitor.py
index 8e6f7b404fd492..57e03cf153fc75 100755
--- a/homeassistant/components/sensor/systemmonitor.py
+++ b/homeassistant/components/sensor/systemmonitor.py
@@ -16,7 +16,7 @@
 import homeassistant.helpers.config_validation as cv
 import homeassistant.util.dt as dt_util
 
-REQUIREMENTS = ['psutil==5.4.2']
+REQUIREMENTS = ['psutil==5.4.3']
 
 _LOGGER = logging.getLogger(__name__)
 
diff --git a/requirements_all.txt b/requirements_all.txt
index 0dccf542fd990c..b39f83a3a7cf1f 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -581,7 +581,7 @@ proliphix==0.4.1
 prometheus_client==0.0.21
 
 # homeassistant.components.sensor.systemmonitor
-psutil==5.4.2
+psutil==5.4.3
 
 # homeassistant.components.wink
 pubnubsub-handler==1.0.2

## Description:
Changelog: https://github.com/giampaolo/psutil/blob/master/HISTORY.rst#543

## Example entry for `configuration.yaml` (if applicable):
```yaml
sensor:
  - platform: systemmonitor
    resources:
      - type: disk_use_percent
        arg: /home
      - type: memory_free
```

## Checklist:

  - [x] The code change is tested and works locally.

If the code communicates with devices, web services, or third-party tools:
  - [x] Local tests with `tox` run successfully. **Your PR cannot be merged unless tests pass**
  - [x] New dependencies have been added to the `REQUIREMENTS` variable ([example][ex-requir]).
  - [x] New dependencies have been added to `requirements_all.txt` by running `script/gen_requirements_all.py`.