diff --git a/packages/auth-providers/auth0/api/src/decoder.ts b/packages/auth-providers/auth0/api/src/decoder.ts
index 1ffb391713e5..b1aa35888066 100644
--- a/packages/auth-providers/auth0/api/src/decoder.ts
+++ b/packages/auth-providers/auth0/api/src/decoder.ts
@@ -65,7 +65,7 @@ export const verifyAuth0Token = (
   })
 }
 
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (token: string, type: string | null) => {
   if (type !== 'auth0') {
     return null
   }
diff --git a/packages/auth-providers/azureActiveDirectory/api/src/decoder.ts b/packages/auth-providers/azureActiveDirectory/api/src/decoder.ts
index 447233db4611..e0ea745b5922 100644
--- a/packages/auth-providers/azureActiveDirectory/api/src/decoder.ts
+++ b/packages/auth-providers/azureActiveDirectory/api/src/decoder.ts
@@ -3,7 +3,7 @@ import jwksClient from 'jwks-rsa'
 
 import type { Decoder } from '@redwoodjs/api'
 
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (token: string, type: string | null) => {
   if (type !== 'azureActiveDirectory') {
     return null
   }
diff --git a/packages/auth-providers/clerk/api/src/decoder.ts b/packages/auth-providers/clerk/api/src/decoder.ts
index 28f2c5dab15e..8be5d9a8b5c1 100644
--- a/packages/auth-providers/clerk/api/src/decoder.ts
+++ b/packages/auth-providers/clerk/api/src/decoder.ts
@@ -3,7 +3,10 @@ import type { Decoder } from '@redwoodjs/api'
 /**
  * @deprecated This function will be removed; it uses a rate-limited API. Use `clerkAuthDecoder` instead.
  */
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (
+  token: string,
+  type: string | null
+) => {
   if (type !== 'clerk') {
     return null
   }
@@ -40,7 +43,7 @@ export const authDecoder: Decoder = async (token: string, type: string) => {
 
 export const clerkAuthDecoder: Decoder = async (
   token: string,
-  type: string
+  type: string | null
 ) => {
   if (type !== 'clerk') {
     return null
diff --git a/packages/auth-providers/firebase/api/src/decoder.ts b/packages/auth-providers/firebase/api/src/decoder.ts
index 57a0001040c5..7b35a10e261a 100644
--- a/packages/auth-providers/firebase/api/src/decoder.ts
+++ b/packages/auth-providers/firebase/api/src/decoder.ts
@@ -5,7 +5,7 @@ import type { Decoder } from '@redwoodjs/api'
 
 // Alternative third-party JWT verification process described here:
 // https://firebase.google.com/docs/auth/admin/verify-id-tokens#verify_id_tokens_using_a_third-party_jwt_library
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (token: string, type: string | null) => {
   if (type !== 'firebase') {
     return null
   }
diff --git a/packages/auth-providers/netlify/api/src/decoder.ts b/packages/auth-providers/netlify/api/src/decoder.ts
index 58dbf4d21226..67b99f7a78b0 100644
--- a/packages/auth-providers/netlify/api/src/decoder.ts
+++ b/packages/auth-providers/netlify/api/src/decoder.ts
@@ -17,7 +17,7 @@ interface NetlifyTokenPayload extends Record<string, unknown> {
 
 export const authDecoder: Decoder = async (
   token: string,
-  type: string,
+  type: string | null,
   req: { context: LambdaContext }
 ) => {
   if (type !== 'netlify') {
diff --git a/packages/auth-providers/supabase/api/src/decoder.ts b/packages/auth-providers/supabase/api/src/decoder.ts
index 4c71dca75df4..c29de810aacf 100644
--- a/packages/auth-providers/supabase/api/src/decoder.ts
+++ b/packages/auth-providers/supabase/api/src/decoder.ts
@@ -2,7 +2,10 @@ import jwt from 'jsonwebtoken'
 
 import type { Decoder } from '@redwoodjs/api'
 
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (
+  token: string,
+  type: string | null
+) => {
   if (type !== 'supabase') {
     return null
   }
diff --git a/packages/auth-providers/supertokens/api/src/decoder.ts b/packages/auth-providers/supertokens/api/src/decoder.ts
index 400f81b9f7bb..04f39b213468 100644
--- a/packages/auth-providers/supertokens/api/src/decoder.ts
+++ b/packages/auth-providers/supertokens/api/src/decoder.ts
@@ -4,7 +4,10 @@ import jwksClient from 'jwks-rsa'
 
 import type { Decoder } from '@redwoodjs/api'
 
-export const authDecoder: Decoder = async (token: string, type: string) => {
+export const authDecoder: Decoder = async (
+  token: string,
+  type: string | null
+) => {
   if (type !== 'supertokens') {
     return null
   }