diff --git a/action.yml b/action.yml
index 50c0fab..bad2235 100644
--- a/action.yml
+++ b/action.yml
@@ -6,6 +6,9 @@ inputs:
     description: Version of Supabase CLI to install
     required: false
     default: 1.28.3
+outputs:
+  version:
+    description: Version of installed Supabase CLI
 runs:
   using: node16
   main: dist/index.js
diff --git a/src/main.ts b/src/main.ts
index ebb5d3c..cde5090 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,7 +1,7 @@
 import * as core from '@actions/core'
 import * as tc from '@actions/tool-cache'
 import gte from 'semver/functions/gte'
-import {getDownloadUrl} from './utils'
+import {getDownloadUrl, determineInstalledVersion} from './utils'
 
 export const CLI_CONFIG_REGISTRY = 'SUPABASE_INTERNAL_IMAGE_REGISTRY'
 
@@ -20,6 +20,10 @@ async function run(): Promise<void> {
     // Expose the tool by adding it to the PATH
     core.addPath(pathToCLI)
 
+    // Expose installed tool version
+    const determinedVersion = await determineInstalledVersion()
+    core.setOutput('version', determinedVersion)
+
     // Use GHCR mirror by default
     if (version.toLowerCase() === 'latest' || gte(version, '1.28.0')) {
       core.exportVariable(CLI_CONFIG_REGISTRY, 'ghcr.io')
diff --git a/src/utils.ts b/src/utils.ts
index aece62b..9f03edf 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -1,5 +1,9 @@
+import {exec} from 'child_process'
 import os from 'os'
 import lt from 'semver/functions/lt'
+import {promisify} from 'util'
+
+const doExec = promisify(exec)
 
 // arch in [arm, arm64, x64...] (https://nodejs.org/docs/latest-v16.x/api/os.html#osarch)
 // return value in [amd64, arm64, arm]
@@ -31,3 +35,14 @@ export const getDownloadUrl = async (version: string): Promise<string> => {
   }
   return `https://github.com/supabase/cli/releases/download/v${version}/${filename}`
 }
+
+export const determineInstalledVersion = async (): Promise<string> => {
+  const {stdout} = await doExec('supabase --version')
+
+  const version = stdout.trim()
+  if (!version) {
+    throw new Error('Could not determine installed Supabase CLI version')
+  }
+
+  return version
+}