diff --git a/src/commands/dev/dev.ts b/src/commands/dev/dev.ts
index c37d4686727..57d652d3c64 100644
--- a/src/commands/dev/dev.ts
+++ b/src/commands/dev/dev.ts
@@ -92,7 +92,7 @@ export const dev = async (options: OptionValues, command: BaseCommand) => {
   const { api, cachedConfig, config, repositoryRoot, site, siteInfo, state } = command.netlify
   config.dev = { ...config.dev }
   config.build = { ...config.build }
-  const devConfig = {
+  const devConfig: DevConfig = {
     framework: '#auto',
     autoLaunch: Boolean(options.open),
     ...(cachedConfig.siteInfo?.dev_server_settings && {
@@ -104,7 +104,7 @@ export const dev = async (options: OptionValues, command: BaseCommand) => {
     ...(config.build.base && { base: config.build.base }),
     ...config.dev,
     ...options,
-  } as DevConfig
+  }
 
   let { env } = cachedConfig
 
diff --git a/src/commands/dev/types.d.ts b/src/commands/dev/types.d.ts
index 8de81b1193f..54b5ac6a15d 100644
--- a/src/commands/dev/types.d.ts
+++ b/src/commands/dev/types.d.ts
@@ -1,4 +1,4 @@
-import type { PollingStrategy, NetlifyTOML } from '@netlify/build-info'
+import type { NetlifyTOML } from '@netlify/build-info'
 
 import type { FrameworkNames } from '../../utils/types'
 
@@ -8,23 +8,14 @@ export type BuildConfig = NonNullable<NetlifyTOML['build']>
 export type DevConfig = NonNullable<NetlifyTOML['dev']> & {
   framework: FrameworkNames
   /** Directory of the functions */
-  functions?: string
-  publish?: string
-  /** Port to serve the functions */
-  port: number
-  live: boolean
+  functions?: string | undefined
+  live?: boolean | undefined
   /** The base directory from the [build] section of the configuration file */
-  base?: string
-  staticServerPort?: number
-  functionsPort?: number
-  autoLaunch?: boolean
-  https?: {
-    keyFile: string
-    certFile: string
-  }
-  envFiles?: string[]
+  base?: string | undefined
+  staticServerPort?: number | undefined
+  envFiles?: string[] | undefined
 
-  jwtSecret: string
-  jwtRolePath: string
-  pollingStrategies?: PollingStrategy[]
+  jwtSecret?: string | undefined
+  jwtRolePath?: string | undefined
+  pollingStrategies?: string[] | undefined
 }
diff --git a/src/commands/serve/serve.ts b/src/commands/serve/serve.ts
index 6c63f3ef911..3b398d4c25b 100644
--- a/src/commands/serve/serve.ts
+++ b/src/commands/serve/serve.ts
@@ -37,7 +37,7 @@ export const serve = async (options: OptionValues, command: BaseCommand) => {
   const { api, cachedConfig, config, frameworksAPIPaths, repositoryRoot, site, siteInfo, state } = command.netlify
   config.dev = { ...config.dev }
   config.build = { ...config.build }
-  const devConfig = {
+  const devConfig: DevConfig = {
     ...(config.functionsDirectory && { functions: config.functionsDirectory }),
     ...(config.build.publish && { publish: config.build.publish }),
 
@@ -46,7 +46,7 @@ export const serve = async (options: OptionValues, command: BaseCommand) => {
     // Override the `framework` value so that we start a static server and not
     // the framework's development server.
     framework: '#static',
-  } as DevConfig
+  }
 
   let { env } = cachedConfig
 
diff --git a/src/utils/detect-server-settings.ts b/src/utils/detect-server-settings.ts
index 30ecf16ee89..b5e4e8b2f47 100644
--- a/src/utils/detect-server-settings.ts
+++ b/src/utils/detect-server-settings.ts
@@ -193,7 +193,7 @@ const handleCustomFramework = ({
     frameworkPort: devConfig.targetPort,
     dist: devConfig.publish || getDefaultDist(workingDir),
     framework: '#custom',
-    pollingStrategies: devConfig.pollingStrategies?.map((s) => s.name) ?? [],
+    pollingStrategies: devConfig.pollingStrategies ?? [],
   }
 }
 
diff --git a/src/utils/types.ts b/src/utils/types.ts
index 27fddc0eead..65603b59dc1 100644
--- a/src/utils/types.ts
+++ b/src/utils/types.ts
@@ -1,7 +1,8 @@
-import { Buffer } from 'buffer'
-import { IncomingMessage } from 'http'
+import type { Buffer } from 'buffer'
+import type { IncomingMessage } from 'http'
 
-import { Match } from 'netlify-redirector'
+import type { PollingStrategy, Settings } from '@netlify/build-info'
+import type { Match } from 'netlify-redirector'
 
 export type FrameworkNames = '#static' | '#auto' | '#custom' | string
 
@@ -12,7 +13,7 @@ export type FrameworkInfo = {
   dev: {
     commands: string[]
     port: number
-    pollingStrategies: { name: string }[]
+    pollingStrategies: PollingStrategy[]
   }
   name: FrameworkNames
   staticAssetsDirectory: string