diff --git a/DOCUMENTATION.md b/DOCUMENTATION.md
index c3a19a111..171a1540c 100644
--- a/DOCUMENTATION.md
+++ b/DOCUMENTATION.md
@@ -358,7 +358,6 @@ const sdk = fromSharedOptions();
             * [.getAllOsVersions(deviceTypes, [options])](#balena.models.os.getAllOsVersions) ⇒ <code>Promise</code>
             * [.getDownloadSize(deviceType, [version])](#balena.models.os.getDownloadSize) ⇒ <code>Promise</code>
             * [.getMaxSatisfyingVersion(deviceType, versionOrRange, [osType])](#balena.models.os.getMaxSatisfyingVersion) ⇒ <code>Promise</code>
-            * [.getLastModified(deviceType, [version])](#balena.models.os.getLastModified) ⇒ <code>Promise</code>
             * [.download(options)](#balena.models.os.download) ⇒ <code>Promise</code>
             * [.getConfig(slugOrUuidOrId, options)](#balena.models.os.getConfig) ⇒ <code>Promise</code>
             * [.isSupportedOsUpdate(deviceType, currentVersion, targetVersion)](#balena.models.os.isSupportedOsUpdate) ⇒ <code>Promise</code>
@@ -761,7 +760,6 @@ balena.models.device.get(123).catch(function (error) {
         * [.getAllOsVersions(deviceTypes, [options])](#balena.models.os.getAllOsVersions) ⇒ <code>Promise</code>
         * [.getDownloadSize(deviceType, [version])](#balena.models.os.getDownloadSize) ⇒ <code>Promise</code>
         * [.getMaxSatisfyingVersion(deviceType, versionOrRange, [osType])](#balena.models.os.getMaxSatisfyingVersion) ⇒ <code>Promise</code>
-        * [.getLastModified(deviceType, [version])](#balena.models.os.getLastModified) ⇒ <code>Promise</code>
         * [.download(options)](#balena.models.os.download) ⇒ <code>Promise</code>
         * [.getConfig(slugOrUuidOrId, options)](#balena.models.os.getConfig) ⇒ <code>Promise</code>
         * [.isSupportedOsUpdate(deviceType, currentVersion, targetVersion)](#balena.models.os.isSupportedOsUpdate) ⇒ <code>Promise</code>
@@ -5117,7 +5115,6 @@ balena.models.organization.remove(123);
     * [.getAllOsVersions(deviceTypes, [options])](#balena.models.os.getAllOsVersions) ⇒ <code>Promise</code>
     * [.getDownloadSize(deviceType, [version])](#balena.models.os.getDownloadSize) ⇒ <code>Promise</code>
     * [.getMaxSatisfyingVersion(deviceType, versionOrRange, [osType])](#balena.models.os.getMaxSatisfyingVersion) ⇒ <code>Promise</code>
-    * [.getLastModified(deviceType, [version])](#balena.models.os.getLastModified) ⇒ <code>Promise</code>
     * [.download(options)](#balena.models.os.download) ⇒ <code>Promise</code>
     * [.getConfig(slugOrUuidOrId, options)](#balena.models.os.getConfig) ⇒ <code>Promise</code>
     * [.isSupportedOsUpdate(deviceType, currentVersion, targetVersion)](#balena.models.os.isSupportedOsUpdate) ⇒ <code>Promise</code>
@@ -5215,29 +5212,6 @@ balena.models.os.getMaxSatisfyingVersion('raspberry-pi', '^2.11.0').then(functio
 	console.log(version);
 });
 ```
-<a name="balena.models.os.getLastModified"></a>
-
-##### os.getLastModified(deviceType, [version]) ⇒ <code>Promise</code>
-**Kind**: static method of [<code>os</code>](#balena.models.os)  
-**Summary**: Get the OS image last modified date  
-**Access**: public  
-**Fulfil**: <code>Date</code> - last modified date  
-
-| Param | Type | Description |
-| --- | --- | --- |
-| deviceType | <code>String</code> | device type slug |
-| [version] | <code>String</code> | semver-compatible version or 'latest', defaults to 'latest'. Unsupported (unpublished) version will result in rejection. The version **must** be the exact version number. To resolve the semver-compatible range use `balena.model.os.getMaxSatisfyingVersion`. |
-
-**Example**  
-```js
-balena.models.os.getLastModified('raspberry-pi').then(function(date) {
-	console.log('The raspberry-pi image was last modified in ' + date);
-});
-
-balena.models.os.getLastModified('raspberrypi3', '2.0.0').then(function(date) {
-	console.log('The raspberry-pi image was last modified in ' + date);
-});
-```
 <a name="balena.models.os.download"></a>
 
 ##### os.download(options) ⇒ <code>Promise</code>
diff --git a/src/models/os.ts b/src/models/os.ts
index 7cf95ebd1..be2c97a56 100644
--- a/src/models/os.ts
+++ b/src/models/os.ts
@@ -619,57 +619,6 @@ const getOsModel = function (
 		return _getMaxSatisfyingVersion(versionOrRange, osVersions) ?? null;
 	};
 
-	/**
-	 * @summary Get the OS image last modified date
-	 * @name getLastModified
-	 * @public
-	 * @function
-	 * @memberof balena.models.os
-	 *
-	 * @param {String} deviceType - device type slug
-	 * @param {String} [version] - semver-compatible version or 'latest', defaults to 'latest'.
-	 * Unsupported (unpublished) version will result in rejection.
-	 * The version **must** be the exact version number.
-	 * To resolve the semver-compatible range use `balena.model.os.getMaxSatisfyingVersion`.
-	 * @fulfil {Date} - last modified date
-	 * @returns {Promise}
-	 *
-	 * @example
-	 * balena.models.os.getLastModified('raspberry-pi').then(function(date) {
-	 * 	console.log('The raspberry-pi image was last modified in ' + date);
-	 * });
-	 *
-	 * balena.models.os.getLastModified('raspberrypi3', '2.0.0').then(function(date) {
-	 * 	console.log('The raspberry-pi image was last modified in ' + date);
-	 * });
-	 */
-	const getLastModified = async function (
-		deviceType: string,
-		version = 'latest',
-	): Promise<Date | null> {
-		try {
-			deviceType = await _getNormalizedDeviceTypeSlug(deviceType);
-			version = normalizeVersion(version);
-			const response = await request.send({
-				method: 'HEAD',
-				url: '/download',
-				qs: {
-					deviceType,
-					version,
-				},
-				baseUrl: apiUrl,
-			});
-
-			const lastModified = response.headers.get('last-modified');
-			return lastModified != null ? new Date(lastModified) : lastModified;
-		} catch (err) {
-			if (isNotFoundResponse(err)) {
-				throw new Error('No such version for the device type');
-			}
-			throw err;
-		}
-	};
-
 	/**
 	 * @summary Download an OS image
 	 * @name download
@@ -1054,7 +1003,6 @@ const getOsModel = function (
 		getAvailableOsVersions,
 		getMaxSatisfyingVersion,
 		getDownloadSize,
-		getLastModified,
 		download,
 		getConfig,
 		isSupportedOsUpdate,
diff --git a/tests/integration/models/os.spec.ts b/tests/integration/models/os.spec.ts
index b0da86e50..dfbe01c17 100644
--- a/tests/integration/models/os.spec.ts
+++ b/tests/integration/models/os.spec.ts
@@ -705,47 +705,6 @@ describe('OS model', function () {
 		});
 	});
 
-	describe('balena.models.os.getLastModified()', function () {
-		parallel('given a valid device slug', function () {
-			it('should eventually be a valid Date instance', async function () {
-				const lastModified =
-					await balena.models.os.getLastModified('raspberry-pi');
-				expect(lastModified).to.be.an.instanceof(Date);
-			});
-
-			it('should eventually be a valid Date instance if passing a device type alias', async function () {
-				const lastModified =
-					await balena.models.os.getLastModified('raspberrypi');
-				expect(lastModified).to.be.an.instanceof(Date);
-			});
-
-			it('should be able to query for a specific version', async function () {
-				const lastModified = await balena.models.os.getLastModified(
-					'raspberrypi',
-					'1.26.1',
-				);
-				expect(lastModified).to.be.an.instanceof(Date);
-			});
-
-			it('should be able to query for a version containing a plus', async function () {
-				const lastModified = await balena.models.os.getLastModified(
-					'raspberrypi',
-					'2.0.6+rev3.prod',
-				);
-				expect(lastModified).to.be.an.instanceof(Date);
-			});
-		});
-
-		describe('given an invalid device slug', () => {
-			it('should be rejected with an error message', async function () {
-				const promise = balena.models.os.getLastModified('foo-bar-baz');
-				await expect(promise).to.be.rejectedWith(
-					'Invalid device type: foo-bar-baz',
-				);
-			});
-		});
-	});
-
 	describe('balena.models.os.download()', function () {
 		if (IS_BROWSER) {
 			return;