diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 093c86c..de90746 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -25,6 +25,7 @@ jobs:
       run:
         shell: bash
     strategy:
+      max-parallel: 1
       matrix:
         system:
           - ubuntu-latest
@@ -49,6 +50,7 @@ jobs:
       run:
         shell: bash
     strategy:
+      max-parallel: 1
       matrix:
         system:
           - ubuntu-latest
@@ -67,3 +69,27 @@ jobs:
             exit 1
           fi
           echo OK
+  test-version-prefix:
+    defaults:
+      run:
+        shell: bash
+    strategy:
+      max-parallel: 1
+      matrix:
+        system:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+    runs-on: ${{ matrix.system }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: run action with latest
+        uses: ./
+        with:
+          version: 0.15.1
+      - name: test CML specific version
+        run: |
+          if [ "$(cml --version 2>&1)" != '0.15.1' ]; then
+            exit 1
+          fi
+          echo OK
diff --git a/README.md b/README.md
index 2650090..4f5229d 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,17 @@ steps:
   - uses: actions/checkout@v3
   - uses: iterative/setup-cml@v2
     with:
-      version: '0.18.1'
+      version: 'v0.18.1'
+```
+
+Without vega tools
+```yaml
+steps:
+  - uses: actions/checkout@v3
+  - uses: iterative/setup-cml@v2
+    with:
+      version: 'v0.20.0'
+      vega: false
 ```
 
 ## Inputs
@@ -93,3 +103,11 @@ When using the `cml runner launch` command a [PAT is required](https://cml.dev/d
 ### CML functions
 
 CML provides several helper functions. See [the docs](https://cml.dev/doc).
+
+## Contributing
+
+To get started after cloning the repo, run `npm ci` (clean-install).
+Before pushing changes or opening a PR run `npm run format && npm run lint` to
+ensure that the code is formatted and linted.
+
+run `npm run build` to compile the action.
diff --git a/dist/index.js b/dist/index.js
index 7f9eed3..49b5b63 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -14938,7 +14938,7 @@ function getCmlDownloadUrl(version, assetName) {
             const response = yield octokit.repos.getReleaseByTag({
                 owner: 'iterative',
                 repo: 'cml',
-                tag: version
+                tag: version.startsWith('v') ? version : `v${version}`
             });
             release = response.data;
         }
diff --git a/src/setup-cml.ts b/src/setup-cml.ts
index 27c3a6f..426a209 100644
--- a/src/setup-cml.ts
+++ b/src/setup-cml.ts
@@ -70,7 +70,7 @@ async function getCmlDownloadUrl(
     const response = await octokit.repos.getReleaseByTag({
       owner: 'iterative',
       repo: 'cml',
-      tag: version
+      tag: version.startsWith('v') ? version : `v${version}`
     });
     release = response.data;
   }