diff --git a/lib/utils/compose-types.d.ts b/lib/utils/compose-types.d.ts
index 5b27abb3..68119ce8 100644
--- a/lib/utils/compose-types.d.ts
+++ b/lib/utils/compose-types.d.ts
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 
+import type { ImageModel, ReleaseModel } from 'balena-release/build/models';
 import type { Composition, ImageDescriptor } from 'resin-compose-parse';
 import type { Pack } from 'tar-stream';
 
@@ -52,7 +53,7 @@ export interface ComposeOpts {
 	inlineLogs?: boolean;
 	multiDockerignore: boolean;
 	noParentCheck: boolean;
-	projectName: string;
+	projectName?: string;
 	projectPath: string;
 	isLocal?: boolean;
 }
@@ -79,7 +80,7 @@ export interface ComposeProject {
 export interface Release {
 	client: ReturnType<typeof import('balena-release').createClient>;
 	release: Pick<
-		import('balena-release/build/models').ReleaseModel,
+		ReleaseModel,
 		| 'id'
 		| 'status'
 		| 'commit'
@@ -91,7 +92,9 @@ export interface Release {
 		| 'start_timestamp'
 		| 'end_timestamp'
 	>;
-	serviceImages: Partial<import('balena-release/build/models').ImageModel>;
+	serviceImages: Dictionary<
+		Omit<ImageModel, 'created_at' | 'is_a_build_of__service' | '__metadata'>
+	>;
 }
 
 interface TarDirectoryOptions {
diff --git a/lib/utils/compose.js b/lib/utils/compose.ts
similarity index 64%
rename from lib/utils/compose.js
rename to lib/utils/compose.ts
index fecd67c8..f07e25fd 100644
--- a/lib/utils/compose.js
+++ b/lib/utils/compose.ts
@@ -15,14 +15,32 @@
  * limitations under the License.
  */
 
+import type { Renderer } from './compose_ts';
+import type * as SDK from 'balena-sdk';
+import type Dockerode = require('dockerode');
 import * as path from 'path';
+import type { Composition, ImageDescriptor } from 'resin-compose-parse';
+import type {
+	BuiltImage,
+	ComposeOpts,
+	ComposeProject,
+	Release,
+	TaggedImage,
+} from './compose-types';
 import { getChalk } from './lazy';
+import Logger = require('./logger');
+import { ProgressCallback } from 'docker-progress';
 
-/**
- * @returns Promise<{import('./compose-types').ComposeOpts}>
- */
-export function generateOpts(options) {
-	const { promises: fs } = require('fs');
+export function generateOpts(options: {
+	source?: string;
+	projectName?: string;
+	nologs: boolean;
+	'noconvert-eol': boolean;
+	dockerfile?: string;
+	'multi-dockerignore': boolean;
+	'noparent-check': boolean;
+}): Promise<ComposeOpts> {
+	const { promises: fs } = require('fs') as typeof import('fs');
 	return fs.realpath(options.source || '.').then((projectPath) => ({
 		projectName: options.projectName,
 		projectPath,
@@ -34,24 +52,19 @@ export function generateOpts(options) {
 	}));
 }
 
-// Parse the given composition and return a structure with info. Input is:
-//  - composePath: the *absolute* path to the directory containing the compose file
-//  - composeStr: the contents of the compose file, as a string
-/**
- * @param {string} composePath
- * @param {string} composeStr
- * @param {string | undefined} projectName The --projectName flag (build, deploy)
- * @param {string | undefined} imageTag The --tag flag (build, deploy)
- * @returns {import('./compose-types').ComposeProject}
+/** Parse the given composition and return a structure with info. Input is:
+ * - composePath: the *absolute* path to the directory containing the compose file
+ *  - composeStr: the contents of the compose file, as a string
  */
 export function createProject(
-	composePath,
-	composeStr,
+	composePath: string,
+	composeStr: string,
 	projectName = '',
 	imageTag = '',
-) {
-	const yml = require('js-yaml');
-	const compose = require('resin-compose-parse');
+): ComposeProject {
+	const yml = require('js-yaml') as typeof import('js-yaml');
+	const compose =
+		require('resin-compose-parse') as typeof import('resin-compose-parse');
 
 	// both methods below may throw.
 	const rawComposition = yml.load(composeStr);
@@ -67,7 +80,8 @@ export function createProject(
 			descr.image.context != null &&
 			descr.image.tag == null
 		) {
-			const { makeImageName } = require('./compose_ts');
+			const { makeImageName } =
+				require('./compose_ts') as typeof import('./compose_ts');
 			descr.image.tag = makeImageName(projectName, descr.serviceName, imageTag);
 		}
 		return descr;
@@ -80,30 +94,20 @@ export function createProject(
 	};
 }
 
-/**
- * @param {string} apiEndpoint
- * @param {string} auth
- * @param {number} userId
- * @param {number} appId
- * @param {import('resin-compose-parse').Composition} composition
- * @param {boolean} draft
- * @param {string|undefined} semver
- * @param {string|undefined} contract
- * @returns {Promise<import('./compose-types').Release>}
- */
 export const createRelease = async function (
-	apiEndpoint,
-	auth,
-	userId,
-	appId,
-	composition,
-	draft,
-	semver,
-	contract,
-) {
-	const _ = require('lodash');
-	const crypto = require('crypto');
-	const releaseMod = require('balena-release');
+	apiEndpoint: string,
+	auth: string,
+	userId: number,
+	appId: number,
+	composition: Composition,
+	draft: boolean,
+	semver?: string,
+	contract?: string,
+): Promise<Release> {
+	const _ = require('lodash') as typeof import('lodash');
+	const crypto = require('crypto') as typeof import('crypto');
+	const releaseMod =
+		require('balena-release') as typeof import('balena-release');
 
 	const client = releaseMod.createClient({ apiEndpoint, auth });
 
@@ -133,24 +137,26 @@ export const createRelease = async function (
 			'start_timestamp',
 			'end_timestamp',
 		]),
-		serviceImages: _.mapValues(serviceImages, (serviceImage) =>
-			_.omit(serviceImage, [
-				'created_at',
-				'is_a_build_of__service',
-				'__metadata',
-			]),
+		serviceImages: _.mapValues(
+			serviceImages,
+			(serviceImage) =>
+				_.omit(serviceImage, [
+					'created_at',
+					'is_a_build_of__service',
+					'__metadata',
+				]) as Omit<
+					typeof serviceImage,
+					'created_at' | 'is_a_build_of__service' | '__metadata'
+				>,
 		),
 	};
 };
 
-/**
- *
- * @param {import('dockerode')} docker
- * @param {Array<import('./compose-types').BuiltImage>} images
- * @param {Partial<import('balena-release/build/models').ImageModel>} serviceImages
- * @returns {Promise<Array<import('./compose-types').TaggedImage>>}
- */
-export const tagServiceImages = (docker, images, serviceImages) =>
+export const tagServiceImages = (
+	docker: Dockerode,
+	images: BuiltImage[],
+	serviceImages: Release['serviceImages'],
+): Promise<TaggedImage[]> =>
 	Promise.all(
 		images.map(function (d) {
 			const serviceImage = serviceImages[d.serviceName];
@@ -177,25 +183,24 @@ export const tagServiceImages = (docker, images, serviceImages) =>
 		}),
 	);
 
-/**
- * @param {*} sdk
- * @param {import('./logger')} logger
- * @param {number} appID
- * @returns {Promise<string[]>}
- */
-export const getPreviousRepos = (sdk, logger, appID) =>
+export const getPreviousRepos = (
+	sdk: SDK.BalenaSDK,
+	logger: Logger,
+	appID: number,
+): Promise<string[]> =>
 	sdk.pine
-		.get({
+		.get<SDK.Release>({
 			resource: 'release',
 			options: {
+				$select: 'id',
 				$filter: {
 					belongs_to__application: appID,
 					status: 'success',
 				},
-				$select: ['id'],
 				$expand: {
 					contains__image: {
-						$expand: 'image',
+						$select: 'image',
+						$expand: { image: { $select: 'is_stored_at__image_location' } },
 					},
 				},
 				$orderby: 'id desc',
@@ -205,8 +210,11 @@ export const getPreviousRepos = (sdk, logger, appID) =>
 		.then(function (release) {
 			// grab all images from the latest release, return all image locations in the registry
 			if (release.length > 0) {
-				const images = release[0].contains__image;
-				const { getRegistryAndName } = require('resin-multibuild');
+				const images = release[0].contains__image as Array<{
+					image: [SDK.Image];
+				}>;
+				const { getRegistryAndName } =
+					require('resin-multibuild') as typeof import('resin-multibuild');
 				return Promise.all(
 					images.map(function (d) {
 						const imageName = d.image[0].is_stored_at__image_location || '';
@@ -226,21 +234,13 @@ export const getPreviousRepos = (sdk, logger, appID) =>
 			return [];
 		});
 
-/**
- * @param {*} sdk
- * @param {string} tokenAuthEndpoint
- * @param {string} registry
- * @param {string[]} images
- * @param {string[]} previousRepos
- * @returns {Promise<string>}
- */
 export const authorizePush = function (
-	sdk,
-	tokenAuthEndpoint,
-	registry,
-	images,
-	previousRepos,
-) {
+	sdk: SDK.BalenaSDK,
+	tokenAuthEndpoint: string,
+	registry: string,
+	images: string[],
+	previousRepos: string[],
+): Promise<string> {
 	if (!Array.isArray(images)) {
 		images = [images];
 	}
@@ -261,17 +261,20 @@ export const authorizePush = function (
 
 // utilities
 
-const renderProgressBar = function (percentage, stepCount) {
-	const _ = require('lodash');
+const renderProgressBar = function (percentage: number, stepCount: number) {
+	const _ = require('lodash') as typeof import('lodash');
 	percentage = _.clamp(percentage, 0, 100);
 	const barCount = Math.floor((stepCount * percentage) / 100);
 	const spaceCount = stepCount - barCount;
 	const bar = `[${_.repeat('=', barCount)}>${_.repeat(' ', spaceCount)}]`;
-	return `${bar} ${_.padStart(percentage, 3)}%`;
+	return `${bar} ${_.padStart(`${percentage}`, 3)}%`;
 };
 
-export const pushProgressRenderer = function (tty, prefix) {
-	const fn = function (e) {
+export const pushProgressRenderer = function (
+	tty: ReturnType<typeof import('./tty')>,
+	prefix: string,
+): ProgressCallback & { end: () => void } {
+	const fn: ProgressCallback & { end: () => void } = function (e) {
 		const { error, percentage } = e;
 		if (error != null) {
 			throw new Error(error);
@@ -285,14 +288,39 @@ export const pushProgressRenderer = function (tty, prefix) {
 	return fn;
 };
 
-export class BuildProgressUI {
-	constructor(tty, descriptors) {
+export class BuildProgressUI implements Renderer {
+	public streams;
+	private _prefix;
+	private _prefixWidth;
+	private _tty;
+	private _services;
+	private _startTime: undefined | number;
+	private _ended;
+	private _serviceToDataMap: Dictionary<{
+		status?: string;
+		progress?: number;
+		error?: Error;
+	}> = {};
+	private _cancelled;
+	private _spinner;
+	private _runloop:
+		| undefined
+		| ReturnType<typeof import('./compose_ts').createRunLoop>;
+
+	// these are to handle window wrapping
+	private _maxLineWidth: undefined | number;
+	private _lineWidths: number[] = [];
+
+	constructor(
+		tty: ReturnType<typeof import('./tty')>,
+		descriptors: ImageDescriptor[],
+	) {
 		this._handleEvent = this._handleEvent.bind(this);
 		this.start = this.start.bind(this);
 		this.end = this.end.bind(this);
 		this._display = this._display.bind(this);
-		const _ = require('lodash');
-		const through = require('through2');
+		const _ = require('lodash') as typeof import('lodash');
+		const through = require('through2') as typeof import('through2');
 
 		const eventHandler = this._handleEvent;
 		const services = _.map(descriptors, 'serviceName');
@@ -310,7 +338,6 @@ export class BuildProgressUI {
 			.value();
 
 		this._tty = tty;
-		this._serviceToDataMap = {};
 		this._services = services;
 
 		// Logger magically prefixes the log line with [Build] etc., but it doesn't
@@ -320,22 +347,22 @@ export class BuildProgressUI {
 
 		const offset = 10; // account for escape sequences inserted for colouring
 		this._prefixWidth =
-			offset + prefix.length + _.max(_.map(services, 'length'));
+			offset + prefix.length + _.max(_.map(services, (s) => s.length))!;
 		this._prefix = prefix;
 
-		// these are to handle window wrapping
-		this._maxLineWidth = null;
-		this._lineWidths = [];
-
-		this._startTime = null;
 		this._ended = false;
 		this._cancelled = false;
-		this._spinner = require('./compose_ts').createSpinner();
+		this._spinner = (
+			require('./compose_ts') as typeof import('./compose_ts')
+		).createSpinner();
 
 		this.streams = streams;
 	}
 
-	_handleEvent(service, event) {
+	_handleEvent(
+		service: string,
+		event: { status?: string; progress?: number; error?: Error },
+	) {
 		this._serviceToDataMap[service] = event;
 	}
 
@@ -344,20 +371,19 @@ export class BuildProgressUI {
 		this._services.forEach((service) => {
 			this.streams[service].write({ status: 'Preparing...' });
 		});
-		this._runloop = require('./compose_ts').createRunLoop(this._display);
+		this._runloop = (
+			require('./compose_ts') as typeof import('./compose_ts')
+		).createRunLoop(this._display);
 		this._startTime = Date.now();
 	}
 
-	/**
-	 * @param {Dictionary<string> | undefined} summary
-	 */
-	end(summary) {
+	end(summary?: Dictionary<string>) {
 		if (this._ended) {
 			return;
 		}
 		this._ended = true;
 		this._runloop?.end();
-		this._runloop = null;
+		this._runloop = undefined;
 
 		this._clear();
 		this._renderStatus(true);
@@ -378,7 +404,7 @@ export class BuildProgressUI {
 	}
 
 	_getServiceSummary() {
-		const _ = require('lodash');
+		const _ = require('lodash') as typeof import('lodash');
 
 		const services = this._services;
 		const serviceToDataMap = this._serviceToDataMap;
@@ -405,11 +431,11 @@ export class BuildProgressUI {
 			.value();
 	}
 
-	_renderStatus(end) {
-		end ??= false;
-
-		const moment = require('moment');
-		require('moment-duration-format')(moment);
+	_renderStatus(end = false) {
+		const moment = require('moment') as typeof import('moment');
+		(
+			require('moment-duration-format') as typeof import('moment-duration-format')
+		)(moment);
 
 		this._tty.clearLine();
 		this._tty.write(this._prefix);
@@ -434,11 +460,11 @@ export class BuildProgressUI {
 		}
 	}
 
-	_renderSummary(serviceToStrMap) {
-		const _ = require('lodash');
+	_renderSummary(serviceToStrMap: Dictionary<string>) {
+		const _ = require('lodash') as typeof import('lodash');
 		const chalk = getChalk();
-		const truncate = require('cli-truncate');
-		const strlen = require('string-width');
+		const truncate = require('cli-truncate') as typeof import('cli-truncate');
+		const strlen = require('string-width') as typeof import('string-width');
 
 		this._services.forEach((service, index) => {
 			let str = _.padEnd(this._prefix + chalk.bold(service), this._prefixWidth);
@@ -454,13 +480,23 @@ export class BuildProgressUI {
 	}
 }
 
-export class BuildProgressInline {
-	constructor(outStream, descriptors) {
+export class BuildProgressInline implements Renderer {
+	public streams;
+	private _prefixWidth;
+	private _outStream;
+	private _services;
+	private _startTime: number | undefined;
+	private _ended;
+
+	constructor(
+		outStream: NodeJS.ReadWriteStream,
+		descriptors: Array<{ serviceName: string }>,
+	) {
 		this.start = this.start.bind(this);
 		this.end = this.end.bind(this);
 		this._renderEvent = this._renderEvent.bind(this);
-		const _ = require('lodash');
-		const through = require('through2');
+		const _ = require('lodash') as typeof import('lodash');
+		const through = require('through2') as typeof import('through2');
 
 		const services = _.map(descriptors, 'serviceName');
 		const eventHandler = this._renderEvent;
@@ -477,10 +513,9 @@ export class BuildProgressInline {
 			.value();
 
 		const offset = 10; // account for escape sequences inserted for colouring
-		this._prefixWidth = offset + _.max(_.map(services, 'length'));
+		this._prefixWidth = offset + _.max(_.map(services, (s) => s.length))!;
 		this._outStream = outStream;
 		this._services = services;
-		this._startTime = null;
 		this._ended = false;
 
 		this.streams = streams;
@@ -494,12 +529,11 @@ export class BuildProgressInline {
 		this._startTime = Date.now();
 	}
 
-	/**
-	 * @param {Dictionary<string> | undefined} summary
-	 */
-	end(summary) {
-		const moment = require('moment');
-		require('moment-duration-format')(moment);
+	end(summary?: Dictionary<string>) {
+		const moment = require('moment') as typeof import('moment');
+		(
+			require('moment-duration-format') as typeof import('moment-duration-format')
+		)(moment);
 
 		if (this._ended) {
 			return;
@@ -527,8 +561,8 @@ export class BuildProgressInline {
 		this._outStream.write(`Built ${serviceStr} in ${durationStr}\n`);
 	}
 
-	_renderEvent(service, event) {
-		const _ = require('lodash');
+	_renderEvent(service: string, event: { status?: string; error?: Error }) {
+		const _ = require('lodash') as typeof import('lodash');
 
 		const str = (function () {
 			const { status, error } = event;
diff --git a/lib/utils/compose_ts.ts b/lib/utils/compose_ts.ts
index 3d374afc..fda9bec9 100644
--- a/lib/utils/compose_ts.ts
+++ b/lib/utils/compose_ts.ts
@@ -235,7 +235,7 @@ interface BuildTaskPlus extends MultiBuild.BuildTask {
 	logBuffer?: string[];
 }
 
-interface Renderer {
+export interface Renderer {
 	start: () => void;
 	end: (buildSummaryByService?: Dictionary<string>) => void;
 	streams: Dictionary<NodeJS.ReadWriteStream>;