diff --git a/.github/workflows/check-deno-version-change.yml b/.github/workflows/check-deno-version-change.yml
new file mode 100644
index 0000000..665ea4a
--- /dev/null
+++ b/.github/workflows/check-deno-version-change.yml
@@ -0,0 +1,38 @@
+name: Check Deno Version Change
+
+on:
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  check-version:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout PR branch
+        uses: actions/checkout@v4
+
+      - name: Compare version in deno.json
+        run: |
+          PR_VERSION=$(jq -r '.version' deno.json)
+
+          MAIN_DENO_JSON=$(curl -s -H "Authorization: token ${{ github.token }}" \
+            "https://api.github.com/repos/${{ github.repository }}/contents/deno.json?ref=main" | \
+            jq -r '.content' | base64 -d)
+
+          MAIN_VERSION=$(echo "$MAIN_DENO_JSON" | jq -r '.version')
+
+          echo "PR version: $PR_VERSION"
+          echo "Main version: $MAIN_VERSION"
+
+          if [ "$PR_VERSION" = "$MAIN_VERSION" ]; then
+            echo "❌ Version in deno.json has not changed compared to main"
+            exit 1
+          else
+            echo "✅ Version has changed from $MAIN_VERSION to $PR_VERSION"
+          fi
diff --git a/.github/workflows/publishToJsr.yml b/.github/workflows/publishToJsr.yml
index 4563b1d..64f1916 100644
--- a/.github/workflows/publishToJsr.yml
+++ b/.github/workflows/publishToJsr.yml
@@ -2,14 +2,14 @@ name: Publish to JSR
 
 on:
   push:
-    tags:
-      - 'v*' # Triggers on version tags like v0.1.0
+    branches:
+      - main
 
 jobs:
   publish:
     runs-on: ubuntu-latest
     permissions:
-      contents: read
+      contents: write # Needed to push tags
       id-token: write # For Deno to authenticate with JSR
 
     steps:
@@ -21,5 +21,22 @@ jobs:
         with:
           deno-version: v2.x
 
+      - name: Extract version from deno.json
+        id: get_version
+        run: |
+          VERSION=$(jq -r '.version' deno.json)
+          echo "VERSION=$VERSION" >> $GITHUB_ENV
+          echo "Version is $VERSION"
+
+      - name: Configure Git identity
+        run: |
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor }}@users.noreply.github.com"
+
+      - name: Create Git tag
+        run: |
+          git tag "v$VERSION"
+          git push origin "v$VERSION"
+
       - name: Publish to JSR
         run: deno publish
diff --git a/deno.json b/deno.json
index 871e2fd..3fe3be9 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,6 @@
 {
   "name": "@johanfive/xmas",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "exports": "./src/index.ts",
   "license": "MIT",
   "imports": {
diff --git a/src/core/test-utils.ts b/src/core/test-utils.ts
index 5da9a2e..c24138e 100644
--- a/src/core/test-utils.ts
+++ b/src/core/test-utils.ts
@@ -2,6 +2,7 @@ import { expect } from 'std/expect/mod.ts';
 import { FakeTime } from 'std/testing/time.ts';
 import type { HttpClient, HttpRequest, HttpResponse } from 'types/http.ts';
 import type { Logger } from 'types/config.ts';
+import denoJson from '../../deno.json' with { type: 'json' };
 
 /**
  * Request-response pair for testing - HTTP response case
@@ -196,6 +197,8 @@ export async function withFakeTime(testFn: (fakeTime: FakeTime) => Promise<void>
   }
 }
 
+const expectedUserAgent = `xmas/${denoJson.version} (Deno)`;
+
 /**
  * Reusable test constants for endpoint testing
  */
@@ -212,7 +215,7 @@ export const TestConstants = {
     'Authorization': 'Basic dGVzdHVzZXI6dGVzdHBhc3M=', // base64 of testuser:testpass
     'Content-Type': 'application/json',
     'Accept': 'application/json',
-    'User-Agent': 'xmas/0.0.1 (Deno)', // Should match version in deno.json
+    'User-Agent': expectedUserAgent,
   } as const,
 
   /** Standard OAuth test configuration for creating RequestHandler instances */
@@ -228,12 +231,12 @@ export const TestConstants = {
     'Authorization': 'Bearer test-access-token',
     'Content-Type': 'application/json',
     'Accept': 'application/json',
-    'User-Agent': 'xmas/0.0.1 (Deno)', // Should match version in deno.json
+    'User-Agent': expectedUserAgent,
   } as const,
 
   TOKEN_REQUEST_HEADERS: {
     'Content-Type': 'application/x-www-form-urlencoded',
     'Accept': 'application/json',
-    'User-Agent': 'xmas/0.0.1 (Deno)', // Should match version in deno.json
+    'User-Agent': expectedUserAgent,
   } as const,
 } as const;