diff --git a/requirements.txt b/requirements.txt
index 00c8c38..f6f1d6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ urllib3==1.26.2
 Jinja2==2.11.2
 # To fix https://github.com/aws/aws-sam-cli/issues/3661
 markupsafe==2.0.1
+prometheus_client==0.19.0
\ No newline at end of file