diff --git a/composer/airflow_1_samples/requirements.txt b/composer/airflow_1_samples/requirements.txt
index 8811986902f..27394a80fad 100644
--- a/composer/airflow_1_samples/requirements.txt
+++ b/composer/airflow_1_samples/requirements.txt
@@ -5,3 +5,4 @@ apache-airflow-backport-providers-google==2021.3.3
 apache-airflow-backport-providers-cncf-kubernetes==2021.3.3
 kubernetes==11.0.0
 scipy==1.4.1; python_version > '3.0'
+idna>=3.7 # not directly required, pinned by Snyk to avoid a vulnerability