diff --git a/adversarial_robustness/requirements.txt b/adversarial_robustness/requirements.txt
index 8e3dcd5..11a7ab5 100644
--- a/adversarial_robustness/requirements.txt
+++ b/adversarial_robustness/requirements.txt
@@ -32,7 +32,7 @@ google-pasta==0.2.0
 googleapis-common-protos==1.53.0
 grpcio==1.34.1
 h5py==3.1.0
-idna==2.10
+idna==3.7
 keras-nightly==2.5.0.dev2021032900
 Keras-Preprocessing==1.1.2
 Markdown==3.3.4