diff --git a/src/background.html b/src/background.html
index 4e0713875ad..118292fa31c 100644
--- a/src/background.html
+++ b/src/background.html
@@ -5,11 +5,7 @@
     <script type="text/javascript" src="lib/tldjs/tld.js"></script>
     <script type="text/javascript" src="lib/forge/forge.js"></script>
     <script type="text/javascript" src="models/api/requestModels.js"></script>
-    <script type="text/javascript" src="models/api/responseModels.js"></script>
-    <script type="text/javascript" src="models/dataModels.js"></script>
     <script type="text/javascript" src="models/domainModels.js"></script>
-    <script type="text/javascript" src="services/i18nService.js"></script>
-    <script type="text/javascript" src="services/constantsService.js"></script>
     <script type="text/javascript" src="services/cryptoService.js"></script>
     <script type="text/javascript" src="services/tokenService.js"></script>
     <script type="text/javascript" src="services/apiService.js"></script>
diff --git a/src/background.js b/src/background.js
index dff97168b30..3b65a8230c3 100644
--- a/src/background.js
+++ b/src/background.js
@@ -1,4 +1,6 @@
 // Service imports
+import ConstantsService from './services/constants.service';
+import i18nService from './services/i18nService.js';
 import LockService from './services/lockService.js';
 import UtilsService from './services/utils.service';
 
diff --git a/src/services/constants.service.ts b/src/services/constants.service.ts
new file mode 100644
index 00000000000..51b8b3ef304
--- /dev/null
+++ b/src/services/constants.service.ts
@@ -0,0 +1,94 @@
+export default class ConstantsService {
+    // TODO: these should probably all be made static
+    readonly environmentUrlsKey: string = 'environmentUrls';
+    readonly disableGaKey: string = 'disableGa';
+    readonly disableAddLoginNotificationKey: string = 'disableAddLoginNotification';
+    readonly disableContextMenuItemKey: string = 'disableContextMenuItem';
+    readonly disableFaviconKey: string = 'disableFavicon';
+    readonly disableAutoTotpCopyKey: string = 'disableAutoTotpCopy';
+    readonly enableAutoFillOnPageLoadKey: string = 'enableAutoFillOnPageLoad';
+    readonly lockOptionKey: string = 'lockOption';
+    readonly lastActiveKey: string = 'lastActive';
+    readonly generatedPasswordHistoryKey: string = 'generatedPasswordHistory';
+
+    // TODO: Convert these objects to enums
+    readonly encType: any = {
+        AesCbc256_B64: 0,
+        AesCbc128_HmacSha256_B64: 1,
+        AesCbc256_HmacSha256_B64: 2,
+        Rsa2048_OaepSha256_B64: 3,
+        Rsa2048_OaepSha1_B64: 4,
+        Rsa2048_OaepSha256_HmacSha256_B64: 5,
+        Rsa2048_OaepSha1_HmacSha256_B64: 6,
+    };
+
+    readonly cipherType: any = {
+        login: 1,
+        secureNote: 2,
+        card: 3,
+        identity: 4,
+    };
+
+    readonly fieldType: any = {
+        text: 0,
+        hidden: 1,
+        boolean: 2,
+    };
+
+    readonly twoFactorProvider: any = {
+        u2f: 4,
+        yubikey: 3,
+        duo: 2,
+        authenticator: 0,
+        email: 1,
+        remember: 5,
+    };
+
+    readonly twoFactorProviderInfo: any[];
+
+    constructor(i18nService: any) {
+        this.twoFactorProviderInfo = [
+            {
+                type: 0,
+                name: i18nService.authenticatorAppTitle,
+                description: i18nService.authenticatorAppDesc,
+                active: true,
+                free: true,
+                displayOrder: 0,
+                priority: 1,
+            },
+            {
+                type: 3,
+                name: i18nService.yubiKeyTitle,
+                description: i18nService.yubiKeyDesc,
+                active: true,
+                displayOrder: 1,
+                priority: 3,
+            },
+            {
+                type: 2,
+                name: 'Duo',
+                description: i18nService.duoDesc,
+                active: true,
+                displayOrder: 2,
+                priority: 2,
+            },
+            {
+                type: 4,
+                name: i18nService.u2fTitle,
+                description: i18nService.u2fDesc,
+                active: true,
+                displayOrder: 3,
+                priority: 4,
+            },
+            {
+                type: 1,
+                name: i18nService.emailTitle,
+                description: i18nService.emailDesc,
+                active: true,
+                displayOrder: 4,
+                priority: 0,
+            },
+        ];
+    }
+}
diff --git a/src/services/constantsService.js b/src/services/constantsService.js
deleted file mode 100644
index fc2296b2906..00000000000
--- a/src/services/constantsService.js
+++ /dev/null
@@ -1,85 +0,0 @@
-function ConstantsService(i18nService) {
-    return {
-        environmentUrlsKey: 'environmentUrls',
-        disableGaKey: 'disableGa',
-        disableAddLoginNotificationKey: 'disableAddLoginNotification',
-        disableContextMenuItemKey: 'disableContextMenuItem',
-        disableFaviconKey: 'disableFavicon',
-        disableAutoTotpCopyKey: 'disableAutoTotpCopy',
-        enableAutoFillOnPageLoadKey: 'enableAutoFillOnPageLoad',
-        lockOptionKey: 'lockOption',
-        lastActiveKey: 'lastActive',
-        generatedPasswordHistory: 'generatedPasswordHistory',
-        encType: {
-            AesCbc256_B64: 0,
-            AesCbc128_HmacSha256_B64: 1,
-            AesCbc256_HmacSha256_B64: 2,
-            Rsa2048_OaepSha256_B64: 3,
-            Rsa2048_OaepSha1_B64: 4,
-            Rsa2048_OaepSha256_HmacSha256_B64: 5,
-            Rsa2048_OaepSha1_HmacSha256_B64: 6
-        },
-        cipherType: {
-            login: 1,
-            secureNote: 2,
-            card: 3,
-            identity: 4
-        },
-        fieldType: {
-            text: 0,
-            hidden: 1,
-            boolean: 2
-        },
-        twoFactorProvider: {
-            u2f: 4,
-            yubikey: 3,
-            duo: 2,
-            authenticator: 0,
-            email: 1,
-            remember: 5
-        },
-        twoFactorProviderInfo: [
-            {
-                type: 0,
-                name: i18nService.authenticatorAppTitle,
-                description: i18nService.authenticatorAppDesc,
-                active: true,
-                free: true,
-                displayOrder: 0,
-                priority: 1
-            },
-            {
-                type: 3,
-                name: i18nService.yubiKeyTitle,
-                description: i18nService.yubiKeyDesc,
-                active: true,
-                displayOrder: 1,
-                priority: 3
-            },
-            {
-                type: 2,
-                name: 'Duo',
-                description: i18nService.duoDesc,
-                active: true,
-                displayOrder: 2,
-                priority: 2
-            },
-            {
-                type: 4,
-                name: i18nService.u2fTitle,
-                description: i18nService.u2fDesc,
-                active: true,
-                displayOrder: 3,
-                priority: 4
-            },
-            {
-                type: 1,
-                name: i18nService.emailTitle,
-                description: i18nService.emailDesc,
-                active: true,
-                displayOrder: 4,
-                priority: 0
-            }
-        ]
-    };
-}
diff --git a/src/services/i18nService.js b/src/services/i18nService.js
index 8571b82c2e0..7ffc90c8ace 100644
--- a/src/services/i18nService.js
+++ b/src/services/i18nService.js
@@ -1,4 +1,4 @@
-function i18nService(utilsService) {
+export default function i18nService(utilsService) {
     this.utilsService = utilsService;
     this.messages = {};