diff --git a/lib/app.ts b/lib/app.ts
index 9a4fb03ec6..40d8c28fb4 100644
--- a/lib/app.ts
+++ b/lib/app.ts
@@ -53,7 +53,7 @@ const runHandler = (handler: Function, defaultResult: any, handlerArg?: any) =>
     .catch(handleHandlerError)
 }
 
-export default function createApp(channel: Channel): AppConfigAPI {
+export default function createApp(channel: Channel): AppConfigAPI<KeyValueMap> {
   const handlers: { [key: string]: any } = {
     [HOOK_STAGE_PRE_INSTALL]: null,
     [HOOK_STAGE_POST_INSTALL]: null,
@@ -105,7 +105,7 @@ export default function createApp(channel: Channel): AppConfigAPI {
     getCurrentState() {
       return channel.call('callAppMethod', 'getCurrentState') as Promise<AppState | null>
     },
-    onConfigure(handler: OnConfigureHandler) {
+    onConfigure(handler: OnConfigureHandler<KeyValueMap>) {
       setHandler(HOOK_STAGE_PRE_INSTALL, handler)
     },
     onConfigurationCompleted(handler: (err: null | { message: string }) => void) {
diff --git a/lib/types/api.types.ts b/lib/types/api.types.ts
index e83402cb5b..f21f0608f0 100644
--- a/lib/types/api.types.ts
+++ b/lib/types/api.types.ts
@@ -312,7 +312,7 @@ export type ConfigAppSDK<InstallationParameters extends KeyValueMap = KeyValueMa
 > & {
   /** A set of IDs actual for the app */
   ids: Omit<IdsAPI, EntryScopedIds | 'app'> & { app: string }
-  app: AppConfigAPI
+  app: AppConfigAPI<InstallationParameters>
 }
 
 export type KnownAppSDK<
diff --git a/lib/types/app.types.ts b/lib/types/app.types.ts
index a4409bf0ac..91805d854f 100644
--- a/lib/types/app.types.ts
+++ b/lib/types/app.types.ts
@@ -10,12 +10,14 @@ export interface AppState {
   EditorInterface: Record<ContentType['sys']['id'], AppStateEditorInterfaceItem>
 }
 
-export type OnConfigureHandlerReturn =
-  | { parameters?: KeyValueMap | null; targetState?: AppState | null }
+export type OnConfigureHandlerReturn<InstallationParameters extends KeyValueMap> =
+  | { parameters?: InstallationParameters | null; targetState?: AppState | null }
   | false
-export type OnConfigureHandler = () => OnConfigureHandlerReturn | Promise<OnConfigureHandlerReturn>
+export type OnConfigureHandler<InstallationParameters extends KeyValueMap> = () =>
+  | OnConfigureHandlerReturn<InstallationParameters>
+  | Promise<OnConfigureHandlerReturn<InstallationParameters>>
 
-export interface AppConfigAPI {
+export interface AppConfigAPI<InstallationParameters extends KeyValueMap> {
   /** Tells the web app that the app is loaded */
   setReady: () => Promise<void>
   /** Returns true if an App is installed */
@@ -23,9 +25,9 @@ export interface AppConfigAPI {
   /** Returns current state of an App */
   getCurrentState: () => Promise<AppState | null>
   /** Returns parameters of an App, null otherwise */
-  getParameters: <T extends KeyValueMap = KeyValueMap>() => Promise<null | T>
+  getParameters: () => Promise<null | InstallationParameters>
   /** Registers a handler to be called to produce parameters for an App */
-  onConfigure: (handler: OnConfigureHandler) => void
+  onConfigure: (handler: OnConfigureHandler<InstallationParameters>) => void
   /** Registers a handler to be called once configuration was finished */
   onConfigurationCompleted: (handler: (err: null | { message: string }) => void) => void
 }