diff --git a/src/components/AddressForm.vue b/src/components/AddressForm.vue
index 331518c..29135b8 100644
--- a/src/components/AddressForm.vue
+++ b/src/components/AddressForm.vue
@@ -18,7 +18,6 @@ import Component from 'vue-class-component';
 
 import store from '@/store';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { loadDataSource } from '@/lib/datasource-utils';
 import TypeaheadInput from './TypeaheadInput.vue';
 
diff --git a/src/components/Autocomplete.vue b/src/components/Autocomplete.vue
index b617a51..c36b683 100644
--- a/src/components/Autocomplete.vue
+++ b/src/components/Autocomplete.vue
@@ -14,7 +14,6 @@ ul.typeahead-autocomplete(:style='style', v-if='hasData')
 import Vue from 'vue';
 import Component from 'vue-class-component';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { addressToString, getDataItemKeys } from '@/lib/utils';
 
 @Component({
diff --git a/src/components/TypeaheadInput.vue b/src/components/TypeaheadInput.vue
index 3561bf9..d04c2b7 100644
--- a/src/components/TypeaheadInput.vue
+++ b/src/components/TypeaheadInput.vue
@@ -36,7 +36,6 @@
 import Vue from 'vue';
 import Component from 'vue-class-component';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { getPossibles } from '@/lib/datasource-utils';
 import { getDataItemKeys } from '@/lib/utils';
 import Autocomplete from './Autocomplete.vue';
diff --git a/src/interface/AddressEntry.ts b/src/global.d.ts
similarity index 94%
rename from src/interface/AddressEntry.ts
rename to src/global.d.ts
index bc0f103..3360416 100644
--- a/src/interface/AddressEntry.ts
+++ b/src/global.d.ts
@@ -37,5 +37,3 @@ interface AddressEntry {
 	amphoe_code?: any;
 	province_code?: any;
 }
-
-export default AddressEntry;
diff --git a/src/index.ts b/src/index.ts
index 4dabcd8..d656de1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,12 +1,19 @@
 import AddressForm from '@/components/AddressForm.vue';
-import V from 'vue';
+import Vue from 'vue';
+
+/* tslint:disable: no-namespace */
+declare global {
+	interface Window {
+		Vue: typeof Vue;
+	}
+}
 
 /**
  * Install as Vue plugin.
  *
- * @param {typeof V} Vue Vue instance.
+ * @param {typeof Vue} vue Vue instance.
  */
-function install(Vue: typeof V): void {
+function install(vue: typeof Vue): void {
 	Vue.component('address-form', AddressForm);
 }
 
diff --git a/src/lib/datasource-utils/get-possibles.ts b/src/lib/datasource-utils/get-possibles.ts
index 3709fcd..33a2d24 100644
--- a/src/lib/datasource-utils/get-possibles.ts
+++ b/src/lib/datasource-utils/get-possibles.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import { calculateSimilarity } from '@/lib/utils';
 import * as filter from 'array-filter';
 
diff --git a/src/lib/datasource-utils/load-data-source.ts b/src/lib/datasource-utils/load-data-source.ts
index 70b626a..790404a 100644
--- a/src/lib/datasource-utils/load-data-source.ts
+++ b/src/lib/datasource-utils/load-data-source.ts
@@ -1,5 +1,4 @@
 import database from '@/data/db.json';
-import AddressEntry from '@/interface/AddressEntry';
 import preprocess from './preprocess';
 
 /**
diff --git a/src/lib/datasource-utils/preprocess.ts b/src/lib/datasource-utils/preprocess.ts
index 419bb8f..9eede1d 100644
--- a/src/lib/datasource-utils/preprocess.ts
+++ b/src/lib/datasource-utils/preprocess.ts
@@ -1,5 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
-
 /**
  * Preprocess data from JSON database.
  *
diff --git a/src/lib/utils/address-to-string.ts b/src/lib/utils/address-to-string.ts
index 429c27e..1cbc56a 100644
--- a/src/lib/utils/address-to-string.ts
+++ b/src/lib/utils/address-to-string.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import highlightQuery from './highlight-query';
 
 export const SEPARATOR: string = '»';
diff --git a/src/lib/utils/calculate-similarity.ts b/src/lib/utils/calculate-similarity.ts
index d3b6f21..81a89a3 100644
--- a/src/lib/utils/calculate-similarity.ts
+++ b/src/lib/utils/calculate-similarity.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import * as stringSimilarity from 'string-similarity';
 
 /**
diff --git a/src/lib/utils/get-data-item-keys.ts b/src/lib/utils/get-data-item-keys.ts
index c147c68..7022ff9 100644
--- a/src/lib/utils/get-data-item-keys.ts
+++ b/src/lib/utils/get-data-item-keys.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import * as filter from 'array-filter';
 
 /**
diff --git a/src/store/actions.ts b/src/store/actions.ts
index 6fbf2dc..98d47a2 100644
--- a/src/store/actions.ts
+++ b/src/store/actions.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import { ActionContext, ActionTree } from 'vuex';
 import { DATA_SOURCE } from './mutation-types';
 import { State } from './state';
diff --git a/src/store/modules/input-module/actions.ts b/src/store/modules/input-module/actions.ts
index d072a2f..9f7e553 100644
--- a/src/store/modules/input-module/actions.ts
+++ b/src/store/modules/input-module/actions.ts
@@ -1,6 +1,5 @@
 import { ActionContext, ActionTree } from 'vuex';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { LIST, VALUE } from '@/store/mutation-types';
 import { State as RootState } from '@/store/state';
 import { InputState } from './state';
diff --git a/src/store/modules/input-module/getters.ts b/src/store/modules/input-module/getters.ts
index 14e79d4..c83740c 100644
--- a/src/store/modules/input-module/getters.ts
+++ b/src/store/modules/input-module/getters.ts
@@ -1,6 +1,5 @@
 import { GetterTree } from 'vuex';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { State as RootState } from '@/store/state';
 import { InputState } from './state';
 
diff --git a/src/store/modules/input-module/mutations.ts b/src/store/modules/input-module/mutations.ts
index 54de498..0ab601c 100644
--- a/src/store/modules/input-module/mutations.ts
+++ b/src/store/modules/input-module/mutations.ts
@@ -1,6 +1,5 @@
 import { MutationTree } from 'vuex';
 
-import AddressEntry from '@/interface/AddressEntry';
 import { LIST, VALUE } from '@/store/mutation-types';
 import { InputState } from './state';
 
diff --git a/src/store/modules/input-module/state.ts b/src/store/modules/input-module/state.ts
index e52d47c..24b6f9c 100644
--- a/src/store/modules/input-module/state.ts
+++ b/src/store/modules/input-module/state.ts
@@ -1,5 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
-
 export class InputState {
 	public value: string = '';
 	public autocompleteList: AddressEntry[] = [];
diff --git a/src/store/mutations.ts b/src/store/mutations.ts
index 878098d..51a861a 100644
--- a/src/store/mutations.ts
+++ b/src/store/mutations.ts
@@ -1,4 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
 import { MutationTree } from 'vuex';
 import { DATA_SOURCE } from './mutation-types';
 import { State } from './state';
diff --git a/src/store/state.ts b/src/store/state.ts
index 1695b0e..bb50307 100644
--- a/src/store/state.ts
+++ b/src/store/state.ts
@@ -1,5 +1,3 @@
-import AddressEntry from '@/interface/AddressEntry';
-
 export class State {
 	public dataSource: AddressEntry[] = null;
 }
diff --git a/src/vue-shims.d.ts b/src/vue-shims.d.ts
index e3c6c72..b3a21c6 100644
--- a/src/vue-shims.d.ts
+++ b/src/vue-shims.d.ts
@@ -2,6 +2,3 @@ declare module '*.vue' {
 	import Vue from 'vue';
 	export default Vue;
 }
-declare interface Window {
-	Vue: any
-}