diff --git a/.changes/next-release/api-change-iotsecuretunneling-45076.json b/.changes/next-release/api-change-iotsecuretunneling-45076.json
new file mode 100644
index 0000000000..6d9503b599
--- /dev/null
+++ b/.changes/next-release/api-change-iotsecuretunneling-45076.json
@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``iotsecuretunneling``",
+  "description": "[``botocore``] Adds dualstack endpoint support for IoT Secure Tunneling"
+}
diff --git a/.changes/next-release/api-change-supplychain-12199.json b/.changes/next-release/api-change-supplychain-12199.json
new file mode 100644
index 0000000000..f96773c449
--- /dev/null
+++ b/.changes/next-release/api-change-supplychain-12199.json
@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``supplychain``",
+  "description": "[``botocore``] Allow vanity DNS domain when creating a new ASC instance"
+}