diff --git a/types/next-redux-wrapper/index.d.ts b/types/next-redux-wrapper/index.d.ts
index f65f3f9d73..e6c7ea600e 100644
--- a/types/next-redux-wrapper/index.d.ts
+++ b/types/next-redux-wrapper/index.d.ts
@@ -45,7 +45,7 @@ declare function nextReduxWrapper<TInitialState = any, TStateProps = any, TDispa
 ): (Component: Component<TOwnProps & TMergedProps>) => NextReduxWrappedComponent;
 
 declare namespace nextReduxWrapper {
-    export interface Options<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> {
+    interface Options<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> {
         createStore: NextStoreCreator<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps>;
         debug?: boolean;
         storeKey?: string;
@@ -54,11 +54,11 @@ declare namespace nextReduxWrapper {
         mergeProps?: MergeProps<TStateProps, TDispatchProps, TOwnProps, TMergedProps>;
         connectOptions?: ConnectOptions;
     }
-    export interface StoreCreatorOptions<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> extends Options<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> {
+    interface StoreCreatorOptions<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> extends Options<TInitialState, TStateProps, TDispatchProps, TOwnProps, TMergedProps> {
         isServer: boolean;
         req?: IncomingMessage;
     }
 
-    export function setPromise(Promise: any): void;
-    export function setDebug(debug: boolean): void;
+    function setPromise(Promise: any): void;
+    function setDebug(debug: boolean): void;
 }
diff --git a/types/next-redux-wrapper/next-redux-wrapper-tests.tsx b/types/next-redux-wrapper/next-redux-wrapper-tests.tsx
index c432ae5ec9..664d793826 100644
--- a/types/next-redux-wrapper/next-redux-wrapper-tests.tsx
+++ b/types/next-redux-wrapper/next-redux-wrapper-tests.tsx
@@ -1,13 +1,13 @@
 import * as React from 'react';
 import withRedux = require('next-redux-wrapper');
-import { createStore, Store, AnyAction } from 'redux';
+import { createStore, Reducer, Store, AnyAction } from 'redux';
 import { StoreCreatorOptions } from 'next-redux-wrapper';
 
 interface InitialState {
     foo: string;
 }
 
-const reducer = (state: InitialState = {foo: ''}, action: AnyAction) => {
+const reducer: Reducer<InitialState> = (state: InitialState = {foo: ''}, action: AnyAction): InitialState => {
     switch (action.type) {
         case 'FOO':
             return {...state, foo: action.payload};
@@ -64,7 +64,8 @@ const com4 = withRedux<InitialState, ConnectStateProps>(
 const com5 = withRedux<InitialState, ConnectStateProps, DispatchProps, OwnProps, MergedProps>(
     makeStore,
     (state: ReduxStore) => ({foo: state.foo, custom: 'hi'}),
-    null, (state: Props) => ({foo: state.foo, custom: 'hi'})
+    undefined,
+    (state: Props) => ({foo: state.foo, custom: 'hi'})
 )(Page);
 
 const com6 = withRedux<InitialState, ConnectStateProps, DispatchProps, OwnProps, MergedProps>(
@@ -75,7 +76,8 @@ const com6 = withRedux<InitialState, ConnectStateProps, DispatchProps, OwnProps,
         return createStore(reducer, initialState);
     },
     (state: ReduxStore) => ({foo: state.foo, custom: 'hi'}),
-    null, (state: Props) => ({foo: state.foo, custom: 'hi'})
+    undefined,
+    (state: Props) => ({foo: state.foo, custom: 'hi'})
 )(Page);
 
 const com7 = withRedux({
diff --git a/types/next-redux-wrapper/tsconfig.json b/types/next-redux-wrapper/tsconfig.json
index f35fb6fa08..75ef2fd85b 100644
--- a/types/next-redux-wrapper/tsconfig.json
+++ b/types/next-redux-wrapper/tsconfig.json
@@ -8,7 +8,7 @@
     "jsx": "react",
     "noImplicitAny": true,
     "noImplicitThis": true,
-    "strictNullChecks": false,
+    "strictNullChecks": true,
     "baseUrl": "../",
     "typeRoots": [
       "../"
diff --git a/types/next-redux-wrapper/tslint.json b/types/next-redux-wrapper/tslint.json
index 98f9451050..3db14f85ea 100644
--- a/types/next-redux-wrapper/tslint.json
+++ b/types/next-redux-wrapper/tslint.json
@@ -1,9 +1 @@
-{
-    "extends": "dtslint/dt.json",
-    "rules": {
-        // All of the different "export default" lines in the index.d.ts
-        // appear to be triggering this.  Remove this when I know of a way
-        // to declare a default export across multiple package/subpackages.
-        "strict-export-declare-modifiers": false
-    }
-}
+{ "extends": "dtslint/dt.json" }