diff --git a/src/app/store/middlewares/logger.js b/src/app/store/middlewares/logger.js
index bfba19e4..60eb1d43 100644
--- a/src/app/store/middlewares/logger.js
+++ b/src/app/store/middlewares/logger.js
@@ -1,3 +1,10 @@
+// @flow strict
+
+import type { Dispatch, Middleware } from 'redux';
+
+import type { State } from '@/store/types/State';
+import type { Actions, MiddlewareAction } from '@/store/types/Actions';
+
 /* eslint-disable no-console */
 /**
  * Taken from: https://github.com/gaearon/todos/blob/17-the-middleware-chain/src/configureStore.js
@@ -7,13 +14,14 @@
  * @param {Object} store - Redux's store
  * @return {Function}
  */
-export default function logger(store) {
+const logger: Middleware<State, Actions, Dispatch<MiddlewareAction<State>>> = (store) => {
+  
   /**
    * Rather than take the next middleware from the store, we'll
    * make it injectable as an argument, so the function that calls
-   * the middlewares can chose which middle ware to pass
+   * the middlewares can chose which middleware to pass
    */
-  return (next) => {
+  return (next) => {    
     if (!console.group) {
       return next;
     }
@@ -25,10 +33,13 @@ export default function logger(store) {
       console.log('%c action', 'color: blue', action);
       const returnValue = next(action);
       console.log('%c next state', 'color: green', store.getState());
+      // $FlowIgnore
       console.groupEnd(action.type);
       return returnValue;
     };
 
   };
 
-}
\ No newline at end of file
+};
+
+export default logger;
diff --git a/src/app/store/types/Actions.js b/src/app/store/types/Actions.js
index 98708fe0..4292d443 100644
--- a/src/app/store/types/Actions.js
+++ b/src/app/store/types/Actions.js
@@ -4,3 +4,14 @@ import type { ProductActionType } from '@/store/types/ProductsType';
 
 export type Actions = 
   ProductActionType
+
+export type ApiMiddlewareAction<S> = {
+  type: string,
+  types?: Array<string>,
+  callAPI?: () => Promise<*>,
+  shouldCallAPI?: (S) => boolean,
+  payload?: *,
+};
+
+export type MiddlewareAction<S> =
+  ApiMiddlewareAction<S>