diff --git a/lib/sequence-diagram.js b/lib/sequence-diagram.js
index 51a964f..9cfcf96 100644
--- a/lib/sequence-diagram.js
+++ b/lib/sequence-diagram.js
@@ -11052,7 +11052,14 @@
 
 	const DEFAULT_FONT = 'sans-serif';
 
-	const OPENTYPE_OPTIONS = {hinting: true};
+	const OPENTYPE_OPTIONS = {
+		features: [
+			{script: 'arab', tags: ['init', 'medi', 'fina', 'rlig']},
+			{script: 'latn', tags: ['liga', 'rlig']},
+		],
+		hinting: true,
+		kerning: true,
+	};
 
 	function getFont(attrs) {
 		const family = (attrs['font-family'] || DEFAULT_FONT).split(',');
diff --git a/package-lock.json b/package-lock.json
index b7b6e52..beb3e9b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4269,9 +4269,9 @@
       }
     },
     "opentype.js": {
-      "version": "0.12.0",
-      "resolved": "https://registry.npmjs.org/opentype.js/-/opentype.js-0.12.0.tgz",
-      "integrity": "sha512-xb0kQVqtNCtLo3iPjCdjaoK48KomcPl2tWK6Fdja25CqwWTyYjpgK1ggb/ioXOzCArkcGzVC3Sts5t0mZSTAqw==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/opentype.js/-/opentype.js-1.1.0.tgz",
+      "integrity": "sha512-SZimNGuUYrsGPk/nNCaytsrCWDbG+YB+G9Mzc6BM5XiIsIQpkhZa1QvSmNa+eN9xr1n+kBnBJih5YLVBviaJQg==",
       "requires": {
         "string.prototype.codepointat": "^0.2.1",
         "tiny-inflate": "^1.0.2"
diff --git a/package.json b/package.json
index cc1774d..a1f00c9 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,6 @@
     "uglify-es": "3.2.2"
   },
   "dependencies": {
-    "opentype.js": "0.12.0"
+    "opentype.js": "^1.1.0"
   }
 }
diff --git a/scripts/svg/VirtualTextSizer.mjs b/scripts/svg/VirtualTextSizer.mjs
index 02f9c22..aa90e84 100644
--- a/scripts/svg/VirtualTextSizer.mjs
+++ b/scripts/svg/VirtualTextSizer.mjs
@@ -41,7 +41,14 @@ addFont('handlee', {
 
 const DEFAULT_FONT = 'sans-serif';
 
-const OPENTYPE_OPTIONS = {hinting: true};
+const OPENTYPE_OPTIONS = {
+	features: [
+		{script: 'arab', tags: ['init', 'medi', 'fina', 'rlig']},
+		{script: 'latn', tags: ['liga', 'rlig']},
+	],
+	hinting: true,
+	kerning: true,
+};
 
 function getFont(attrs) {
 	const family = (attrs['font-family'] || DEFAULT_FONT).split(',');