diff --git a/taskcluster/requirements.txt b/taskcluster/requirements.txt
index b7cf220dca6fc..a4cdfc6558b20 100644
--- a/taskcluster/requirements.txt
+++ b/taskcluster/requirements.txt
@@ -128,9 +128,9 @@ giturlparse==0.12.0 \
     --hash=sha256:412b74f2855f1da2fefa89fd8dde62df48476077a72fc19b62039554d27360eb \
     --hash=sha256:c0fff7c21acc435491b1779566e038757a205c1ffdcb47e4f81ea52ad8c3859a
     # via mozilla-repo-urls
-idna==3.8 \
-    --hash=sha256:050b4e5baadcd44d760cedbd2b8e639f2ff89bbc7a5730fcc662954303377aac \
-    --hash=sha256:d838c2c0ed6fced7693d5e8ab8e734d5f8fda53a039c0164afb0b82e771e3603
+idna==3.15 \
+    --hash=sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8 \
+    --hash=sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc
     # via requests
 jinja2==3.1.6 \
     --hash=sha256:0137fb05990d35f1275a587e9aee6d56da821fc83491a0fb838183be43f66d6d \