diff --git a/src/core/managers/PendingTransactionsStateManager/PendingTransactionsStateManagement.ts b/src/core/managers/PendingTransactionsStateManager/PendingTransactionsStateManagement.ts
index 3d24845..c6abb54 100644
--- a/src/core/managers/PendingTransactionsStateManager/PendingTransactionsStateManagement.ts
+++ b/src/core/managers/PendingTransactionsStateManager/PendingTransactionsStateManagement.ts
@@ -1,15 +1,16 @@
+import { IEventBus } from 'types/manager.types';
 import {
   IPendingTransactionsModalData,
   PendingTransactionsEventsEnum
 } from './types';
 
-interface IEventBus {
-  publish(event: string, data: any): void;
-}
-
-export class PendingTransactionsStateManager<T extends IEventBus = IEventBus> {
-  private static instance: PendingTransactionsStateManager<IEventBus> | null =
-    null;
+export class PendingTransactionsStateManager<
+  T extends
+    IEventBus<IPendingTransactionsModalData> = IEventBus<IPendingTransactionsModalData>
+> {
+  private static instance: PendingTransactionsStateManager<
+    IEventBus<IPendingTransactionsModalData>
+  > | null = null;
   private eventBus: T;
 
   private initialData: IPendingTransactionsModalData = {
@@ -25,7 +26,7 @@ export class PendingTransactionsStateManager<T extends IEventBus = IEventBus> {
     this.eventBus = eventBus;
   }
 
-  public static getInstance<U extends IEventBus>(
+  public static getInstance<U extends IEventBus<IPendingTransactionsModalData>>(
     eventBus: U
   ): PendingTransactionsStateManager<U> {
     if (!PendingTransactionsStateManager.instance) {
diff --git a/src/core/managers/WalletConnectStateManager/WalletConnectStateManager.ts b/src/core/managers/WalletConnectStateManager/WalletConnectStateManager.ts
index 6468f6e..a33d9cf 100644
--- a/src/core/managers/WalletConnectStateManager/WalletConnectStateManager.ts
+++ b/src/core/managers/WalletConnectStateManager/WalletConnectStateManager.ts
@@ -2,13 +2,15 @@ import {
   IWalletConnectModalData,
   WalletConnectEventsEnum
 } from 'core/providers/strategies/WalletConnectProviderStrategy/types';
-
-interface IEventBus {
-  publish(event: string, data: any): void;
-}
-
-export class WalletConnectStateManager<T extends IEventBus = IEventBus> {
-  private static instance: WalletConnectStateManager<IEventBus> | null = null;
+import { IEventBus } from 'types/manager.types';
+
+export class WalletConnectStateManager<
+  T extends
+    IEventBus<IWalletConnectModalData> = IEventBus<IWalletConnectModalData>
+> {
+  private static instance: WalletConnectStateManager<
+    IEventBus<IWalletConnectModalData>
+  > | null = null;
   private eventBus: T;
 
   private initialData: IWalletConnectModalData = {
@@ -22,7 +24,7 @@ export class WalletConnectStateManager<T extends IEventBus = IEventBus> {
     this.eventBus = eventBus;
   }
 
-  public static getInstance<U extends IEventBus>(
+  public static getInstance<U extends IEventBus<IWalletConnectModalData>>(
     eventBus: U
   ): WalletConnectStateManager<U> {
     if (!WalletConnectStateManager.instance) {
diff --git a/src/types/manager.types.ts b/src/types/manager.types.ts
new file mode 100644
index 0000000..5f6cedf
--- /dev/null
+++ b/src/types/manager.types.ts
@@ -0,0 +1,3 @@
+export interface IEventBus<T> {
+  publish(event: string, data: T): void;
+}