diff --git a/package-lock.json b/package-lock.json
index 050d07e..522c183 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "ppt-png",
-    "version": "2.1.1",
+    "version": "2.1.2",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "ppt-png",
-            "version": "2.1.1",
+            "version": "2.1.2",
             "license": "MIT",
             "dependencies": {
                 "@hckrnews/converter": "^0.5.2",
@@ -1885,7 +1885,6 @@
             "resolved": "https://registry.npmjs.org/eslint-plugin-prettier/-/eslint-plugin-prettier-5.2.1.tgz",
             "integrity": "sha512-gH3iR3g4JfF+yYPaJYkN7jEl9QbweL/YfkoRlNnuIEHEz1vHVlCmWOS+eGGiRuzHQXdJFCOTxRgvju9b8VUmrw==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
                 "prettier-linter-helpers": "^1.0.0",
                 "synckit": "^0.9.1"
@@ -4445,7 +4444,6 @@
             "resolved": "https://registry.npmjs.org/synckit/-/synckit-0.9.1.tgz",
             "integrity": "sha512-7gr8p9TQP6RAHusBOSLs46F4564ZrjV8xFmw5zCmgmhGUcw2hxsShhJ6CEiHQMgPDwAQ1fWHPM0ypc4RMAig4A==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
                 "@pkgr/core": "^0.1.0",
                 "tslib": "^2.6.2"
diff --git a/package.json b/package.json
index 6545168..ed9a5b5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "ppt-png",
-    "version": "2.1.1",
+    "version": "2.1.2",
     "description": "Convert ppt to image (png,jpg)",
     "files": [
         "src/converter.js",
diff --git a/src/__tests__/converter.test.js b/src/__tests__/converter.test.js
index 0f48ec6..1522538 100644
--- a/src/__tests__/converter.test.js
+++ b/src/__tests__/converter.test.js
@@ -23,8 +23,8 @@ test('PPT-PNG converter test', async (t) => {
             output: 'output/',
             options: {
                 density: 300,
-                quality: 100
-            }
+                quality: 100,
+            },
         });
 
         const result = converter.convert();
@@ -33,6 +33,8 @@ test('PPT-PNG converter test', async (t) => {
             result[0].file.path,
             'output/OPW 733 Tienduizend redenen.pdf'
         );
+        assert.strictEqual(converter.density, 300);
+        assert.strictEqual(converter.quality, 100);
         assert.strictEqual(
             fileExists('output/OPW 733 Tienduizend redenen.pdf'),
             true
diff --git a/src/converter.js b/src/converter.js
index b9ff14b..4eebbd5 100644
--- a/src/converter.js
+++ b/src/converter.js
@@ -15,6 +15,8 @@ class Ppt2PngConverter extends Converter {
     constructor() {
         super();
         this.files = [];
+        this.density = null;
+        this.quality = null;
     }
 
     /**
@@ -67,8 +69,8 @@ class Ppt2PngConverter extends Converter {
         converter.setFiles(files);
         converter.setOutput(output);
 
-        converter.density = (options && options.density) || undefined;
-        converter.quality = (options && options.quality) || undefined;
+        converter.density = options?.density;
+        converter.quality = options?.quality;
 
         return converter;
     }