diff --git a/setup.cfg b/setup.cfg
index 8453780..2912311 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -77,6 +77,7 @@ datadog =
     datadog_api_client
 dynatrace =
     requests
+    retrying==1.3.4
 bigquery =
     google-api-python-client
     google-cloud-bigquery