diff --git a/requirements.txt b/requirements.txt
index 84734e0..b20afa2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ charset-normalizer==3.3.2
     # via requests
 click==8.1.7
     # via -r requirements.in
-idna==3.8
+idna==3.15
     # via requests
 json-merge-patch==0.2
     # via ocdsextensionregistry
diff --git a/requirements_dev.txt b/requirements_dev.txt
index d9feb20..e15ef9f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -21,7 +21,7 @@ charset-normalizer==3.3.2
     #   requests
 click==8.1.7
     # via -r requirements.txt
-idna==3.8
+idna==3.15
     # via
     #   -r requirements.txt
     #   requests