diff --git a/.contractual/changesets/add-microchip-field.md b/.contractual/changesets/add-microchip-field.md
deleted file mode 100644
index 107f87d..0000000
--- a/.contractual/changesets/add-microchip-field.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-"petstore": minor
----
-
-## petstore
-
-- **[minor]** add optional microchipId field to Pet schema for tracking pet microchips
diff --git a/.contractual/snapshots/petstore.yaml b/.contractual/snapshots/petstore.yaml
index 1ee263a..eabc2e7 100644
--- a/.contractual/snapshots/petstore.yaml
+++ b/.contractual/snapshots/petstore.yaml
@@ -140,6 +140,10 @@ components:
           type: number
           minimum: 0
           description: Weight of the pet in kilograms (optional)
+        microchipId:
+          type: string
+          pattern: '^[0-9]{15}$'
+          description: 15-digit microchip ID (optional)
         status:
           type: string
           enum:
diff --git a/.contractual/versions.json b/.contractual/versions.json
index a215889..46afb34 100644
--- a/.contractual/versions.json
+++ b/.contractual/versions.json
@@ -1,6 +1,6 @@
 {
   "petstore": {
-    "version": "2.0.0",
-    "released": "2026-03-28T17:39:25.517Z"
+    "version": "2.1.0",
+    "released": "2026-03-28T17:48:50.734Z"
   }
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1a84fca..b5991c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [petstore] v2.1.0 - 2026-03-28
+
+- **[minor]** add optional microchipId field to Pet schema for tracking pet microchips
+
 ## [petstore] v2.0.0 - 2026-03-28
 
 - **[BREAKING]** remove path at paths./pets/{petId}