diff --git a/src/routes/api/image.js b/src/routes/api/image.js
index 14b034119..a48978a0d 100644
--- a/src/routes/api/image.js
+++ b/src/routes/api/image.js
@@ -2,7 +2,7 @@
 
 const imageService = require('../../services/image.js');
 const becca = require('../../becca/becca.js');
-const RESOURCE_DIR = require('../../services/resource_dir.js').RESOURCE_DIR;
+const RESOURCE_DIR = require('../../services/resource_dir').RESOURCE_DIR;
 const fs = require('fs');
 
 function returnImageFromNote(req, res) {
diff --git a/src/services/app_icon.js b/src/services/app_icon.js
index 3e7b48e24..ec18dab45 100644
--- a/src/services/app_icon.js
+++ b/src/services/app_icon.js
@@ -1,7 +1,7 @@
 "use strict";
 
 const path = require('path');
-const {ELECTRON_APP_ROOT_DIR} = require('./resource_dir.js');
+const {ELECTRON_APP_ROOT_DIR} = require('./resource_dir');
 const log = require('./log');
 const os = require('os');
 const fs = require('fs');
diff --git a/src/services/config.js b/src/services/config.js
index c57942a8c..8bc0723a7 100644
--- a/src/services/config.js
+++ b/src/services/config.js
@@ -4,7 +4,7 @@ const ini = require('ini');
 const fs = require('fs');
 const dataDir = require('./data_dir');
 const path = require('path');
-const resourceDir = require('./resource_dir.js');
+const resourceDir = require('./resource_dir');
 
 const configSampleFilePath = path.resolve(resourceDir.RESOURCE_DIR, "config-sample.ini");
 
diff --git a/src/services/export/zip.js b/src/services/export/zip.js
index e0ca9f3f2..79625eee1 100644
--- a/src/services/export/zip.js
+++ b/src/services/export/zip.js
@@ -11,7 +11,7 @@ const protectedSessionService = require('../protected_session.js');
 const sanitize = require("sanitize-filename");
 const fs = require("fs");
 const becca = require('../../becca/becca.js');
-const RESOURCE_DIR = require('../../services/resource_dir.js').RESOURCE_DIR;
+const RESOURCE_DIR = require('../../services/resource_dir').RESOURCE_DIR;
 const archiver = require('archiver');
 const log = require('../log');
 const TaskContext = require('../task_context.js');
diff --git a/src/services/migration.js b/src/services/migration.js
index efe122a46..3b6caa251 100644
--- a/src/services/migration.js
+++ b/src/services/migration.js
@@ -3,7 +3,7 @@ const sql = require('./sql');
 const fs = require('fs-extra');
 const log = require('./log');
 const utils = require('./utils');
-const resourceDir = require('./resource_dir.js');
+const resourceDir = require('./resource_dir');
 const appInfo = require('./app_info.js');
 const cls = require('./cls');
 
diff --git a/src/services/resource_dir.js b/src/services/resource_dir.ts
similarity index 88%
rename from src/services/resource_dir.js
rename to src/services/resource_dir.ts
index 4f3710e18..5bd21b31d 100644
--- a/src/services/resource_dir.js
+++ b/src/services/resource_dir.ts
@@ -1,6 +1,6 @@
-const log = require('./log');
-const path = require('path');
-const fs = require('fs');
+import log = require('./log');
+import path = require('path');
+import fs = require('fs');
 
 const RESOURCE_DIR = path.resolve(__dirname, "../..");
 
diff --git a/src/services/sql_init.js b/src/services/sql_init.js
index f11763886..4b89ae389 100644
--- a/src/services/sql_init.js
+++ b/src/services/sql_init.js
@@ -1,6 +1,6 @@
 const log = require('./log');
 const fs = require('fs');
-const resourceDir = require('./resource_dir.js');
+const resourceDir = require('./resource_dir');
 const sql = require('./sql');
 const utils = require('./utils');
 const optionService = require('./options.js');