diff --git a/src/manifest.ts b/src/manifest.ts
index d7601cdba..a05543031 100644
--- a/src/manifest.ts
+++ b/src/manifest.ts
@@ -4,11 +4,29 @@ import { arch, platform } from 'process'
 import { FunctionResult } from './utils/format_result'
 import { writeFile } from './utils/fs'
 
+interface ManifestFunction {
+  mainFile: string
+  name: string
+  path: string
+  runtime: string
+  schedule?: string
+}
+
+interface Manifest {
+  functions: ManifestFunction[]
+  system: {
+    arch: string
+    platform: string
+  }
+  timestamp: number
+  version: number
+}
+
 const MANIFEST_VERSION = 1
 
 const createManifest = async ({ functions, path }: { functions: FunctionResult[]; path: string }) => {
   const formattedFunctions = functions.map(formatFunctionForManifest)
-  const payload = {
+  const payload: Manifest = {
     functions: formattedFunctions,
     system: { arch, platform },
     timestamp: Date.now(),
@@ -18,7 +36,7 @@ const createManifest = async ({ functions, path }: { functions: FunctionResult[]
   await writeFile(path, JSON.stringify(payload))
 }
 
-const formatFunctionForManifest = ({ config, mainFile, name, path, runtime }: FunctionResult) => ({
+const formatFunctionForManifest = ({ config, mainFile, name, path, runtime }: FunctionResult): ManifestFunction => ({
   mainFile,
   name,
   path: resolve(path),
@@ -27,3 +45,4 @@ const formatFunctionForManifest = ({ config, mainFile, name, path, runtime }: Fu
 })
 
 export { createManifest }
+export type { Manifest }