diff --git a/src/docker.js b/src/docker.js
index 01de483..40b3672 100644
--- a/src/docker.js
+++ b/src/docker.js
@@ -3,7 +3,7 @@ const core = require('@actions/core');
 const fs = require('fs');
 const { context } = require('@actions/github');
 const { isGitHubTag, isBranch, isPullRequest, branchRefToSlug, prRefToSlug, tagRefToSlug } = require('./github');
-const { timestamp, cpOptions } = require('./utils');
+const { timestamp, cpOptions, asBool } = require('./utils');
 
 const GITHUB_REGISTRY_URLS = ['docker.pkg.github.com', 'ghcr.io'];
 
@@ -46,7 +46,7 @@ const createTags = (addLatest, addTimestamp) => {
     );
   }
 
-  if (addLatest) {
+  if (asBool(addLatest)) {
     dockerTags.push('latest');
   }
 
diff --git a/src/utils.js b/src/utils.js
index b741fa3..609985c 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -14,8 +14,30 @@ const cpOptions = {
   stdio: 'inherit'
 };
 
+/**
+ * Convert a value to a boolean
+ * @param {*} value the value to convert
+ * @returns boolean value
+ */
+const asBool = value => {
+  switch (
+    String(value ?? '')
+      .trim()
+      .toLowerCase()
+  ) {
+    case 'true':
+    case 'y':
+    case 'yes':
+    case '1':
+      return true;
+    default:
+      return false;
+  }
+};
+
 module.exports = {
   timestamp,
   parseArray,
-  cpOptions
+  cpOptions,
+  asBool
 };
diff --git a/tests/docker.test.js b/tests/docker.test.js
index b35c527..d73967f 100644
--- a/tests/docker.test.js
+++ b/tests/docker.test.js
@@ -43,6 +43,18 @@ describe('Create Docker image tags', () => {
     expect(tags.length).toEqual(2);
   });
 
+  test('Create from tag push with addLatest passed as string', () => {
+    context.ref = 'refs/tags/v1.0';
+    context.sha = '8d93430eddafb926c668181c71f579556f68668c';
+    addLatest = 'true';
+
+    const tags = docker.createTags(addLatest, addTimestamp);
+
+    expect(tags).toContain('v1.0');
+    expect(tags).toContain('latest');
+    expect(tags.length).toEqual(2);
+  });
+
   test('Create from tag push with addTimestamp', () => {
     context.ref = 'refs/tags/v1.0';
     context.sha = '8d93430eddafb926c668181c71f579556f68668c';
diff --git a/tests/utils.test.js b/tests/utils.test.js
index f74eb23..3267bf9 100644
--- a/tests/utils.test.js
+++ b/tests/utils.test.js
@@ -1,4 +1,4 @@
-const { parseArray } = require('../src/utils');
+const { parseArray, asBool } = require('../src/utils');
 
 describe('Parse a comma-delimited strings', () => {
   test('Parse string with spaces and return an array', () => {
@@ -37,3 +37,32 @@ describe('Parse a comma-delimited strings', () => {
     expect(value).toEqual(undefined);
   });
 });
+
+describe('Convert a value to a boolean', () => {
+  test.each`
+    value        | as             | expected
+    ${true}      | ${'boolean'}   | ${true}
+    ${false}     | ${'boolean'}   | ${false}
+    ${'true'}    | ${'string'}    | ${true}
+    ${'false'}   | ${'string'}    | ${false}
+    ${'1'}       | ${'string'}    | ${true}
+    ${'0'}       | ${'string'}    | ${false}
+    ${'-1'}      | ${'string'}    | ${false}
+    ${'N'}       | ${'string'}    | ${false}
+    ${'n'}       | ${'string'}    | ${false}
+    ${'No'}      | ${'string'}    | ${false}
+    ${'no'}      | ${'string'}    | ${false}
+    ${'Y'}       | ${'string'}    | ${true}
+    ${'y'}       | ${'string'}    | ${true}
+    ${'Yes'}     | ${'string'}    | ${true}
+    ${'yes'}     | ${'string'}    | ${true}
+    ${1}         | ${'number'}    | ${true}
+    ${0}         | ${'number'}    | ${false}
+    ${-1}        | ${'number'}    | ${false}
+    ${undefined} | ${'undefined'} | ${false}
+  `(`returns $expected for '$value' as $as`, ({ value, expected }) => {
+    const result = asBool(value);
+    expect(typeof result).toBe('boolean');
+    expect(result).toEqual(expected);
+  });
+});