diff --git a/webhooks-with-cloud-run/MicroServices/Slack/requirements.txt b/webhooks-with-cloud-run/MicroServices/Slack/requirements.txt
index 75cb86e..615638f 100644
--- a/webhooks-with-cloud-run/MicroServices/Slack/requirements.txt
+++ b/webhooks-with-cloud-run/MicroServices/Slack/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.1.1
 pytest==5.3.0; python_version > "3.0"
 pytest==4.6.6; python_version < "3.0"
-gunicorn==19.9.0
+gunicorn==22.0.0
 google-cloud-secret-manager==0.1.0
 google-cloud-bigquery==1.23.1
 jwt==0.6.1
\ No newline at end of file