diff --git a/auth0/auth0.d.ts b/auth0/auth0.d.ts
index 0608674ae7..5ca8487f85 100644
--- a/auth0/auth0.d.ts
+++ b/auth0/auth0.d.ts
@@ -21,6 +21,7 @@ interface Auth0Static {
     loginWithUsernamePassword(options: Auth0LoginOptions, callback: (error?: Auth0Error, profile?: Auth0UserProfile, id_token?: string, access_token?: string, state?: string) => any): void;
     logout(query: string): void;
     getConnections(callback?: Function): void;
+    refreshToken(refreshToken: string, callback: (error?: Auth0Error, delegationResult?: Auth0DelegationToken) => any): void;
     getDelegationToken(targetClientId: string, id_token: string, options: any, callback: (error?: Auth0Error, delegationResult?: Auth0DelegationToken) => any): void;
     getProfile(id_token: string, callback?: Function): Auth0UserProfile;
     getSSOData(withActiveDirectories: any, callback?: Function): void;