diff --git a/requirements.txt b/requirements.txt
index e3b4376..021719f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,9 @@ charset-normalizer==3.3.0
     # via requests
 click==8.1.7
     # via -r requirements.in
-idna==3.4
+exceptiongroup==1.2.0
+    # via cattrs
+idna==3.7
     # via requests
 json-merge-patch==0.2
     # via ocdsextensionregistry
@@ -36,6 +38,8 @@ requests-cache==1.1.0
     #   ocdsextensionregistry
 six==1.16.0
     # via url-normalize
+typing-extensions==4.11.0
+    # via cattrs
 url-normalize==1.4.3
     # via requests-cache
 urllib3==2.0.7
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 747659b..2957b54 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -25,7 +25,12 @@ charset-normalizer==3.3.0
     #   requests
 click==8.1.7
     # via -r requirements.txt
-idna==3.4
+exceptiongroup==1.2.0
+    # via
+    #   -r requirements.txt
+    #   cattrs
+    #   pytest
+idna==3.7
     # via
     #   -r requirements.txt
     #   requests
@@ -76,6 +81,12 @@ six==1.16.0
     #   -r requirements.txt
     #   rfc3339-validator
     #   url-normalize
+tomli==2.0.1
+    # via pytest
+typing-extensions==4.11.0
+    # via
+    #   -r requirements.txt
+    #   cattrs
 url-normalize==1.4.3
     # via
     #   -r requirements.txt