diff --git a/composer.json b/composer.json
index 48abb305..b67f2d14 100644
--- a/composer.json
+++ b/composer.json
@@ -40,6 +40,7 @@
     "prefer-stable": true,
     "require": {
         "php": ">=7.3",
+        "ext-json": "*",
         "symfony/polyfill-php80": "^1.15"
     },
     "require-dev": {
diff --git a/src/JsDumper/JsDumper.php b/src/JsDumper/JsDumper.php
index 9703f052..d870ca64 100644
--- a/src/JsDumper/JsDumper.php
+++ b/src/JsDumper/JsDumper.php
@@ -163,10 +163,17 @@ private function generateReadables(string $enumFqcn): string
                 continue;
             }
 
+            $flags = JSON_UNESCAPED_UNICODE
+                | JSON_UNESCAPED_SLASHES
+                | JSON_PRESERVE_ZERO_FRACTION
+                | JSON_THROW_ON_ERROR;
+
+            $readable = json_encode($readable, $flags);
+
             $readablesCode .=
                     <<<JS
 
-      [{$shortName}.{$constant}]: '{$readable}',
+      [{$shortName}.{$constant}]: {$readable},
 JS;
         }
 
@@ -177,10 +184,17 @@ private function generateReadables(string $enumFqcn): string
                     continue;
                 }
 
+                $flags = JSON_UNESCAPED_UNICODE
+                    | JSON_UNESCAPED_SLASHES
+                    | JSON_PRESERVE_ZERO_FRACTION
+                    | JSON_THROW_ON_ERROR;
+
+                $readable = json_encode($readable, $flags);
+
                 $readablesCode .=
                     <<<JS
 
-      [{$shortName}.{$constant}]: '{$readable}',
+      [{$shortName}.{$constant}]: {$readable},
 JS;
             }
         }
diff --git a/tests/Fixtures/Enum/NeedsEscapingEnum.php b/tests/Fixtures/Enum/NeedsEscapingEnum.php
new file mode 100644
index 00000000..50fa79ff
--- /dev/null
+++ b/tests/Fixtures/Enum/NeedsEscapingEnum.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of the "elao/enum" package.
+ *
+ * Copyright (C) Elao
+ *
+ * @author Elao <contact@elao.com>
+ */
+
+namespace Elao\Enum\Tests\Fixtures\Enum;
+
+use Elao\Enum\ReadableEnum;
+
+/**
+ * @method static NeedsEscapingEnum APOSTROPHE()
+ * @method static NeedsEscapingEnum FORWARD_SLASH()
+ */
+class NeedsEscapingEnum extends ReadableEnum
+{
+    public const APOSTROPHE = 'apostrophe';
+    public const FORWARD_SLASH = 'forward_slash';
+
+    public static function values(): array
+    {
+        return [
+            self::APOSTROPHE,
+            self::FORWARD_SLASH,
+        ];
+    }
+
+    public static function readables(): array
+    {
+        return [
+            self::APOSTROPHE => '\'',
+            self::FORWARD_SLASH => '/',
+        ];
+    }
+}
diff --git a/tests/Fixtures/JsDumper/expected/flagged_enum.js b/tests/Fixtures/JsDumper/expected/flagged_enum.js
index 36988ec1..2c342ddb 100644
--- a/tests/Fixtures/JsDumper/expected/flagged_enum.js
+++ b/tests/Fixtures/JsDumper/expected/flagged_enum.js
@@ -8,12 +8,12 @@ class Permissions extends FlaggedEnum {
 
   static get readables() {
     return {
-      [Permissions.EXECUTE]: 'Execute',
-      [Permissions.WRITE]: 'Write',
-      [Permissions.READ]: 'Read',
+      [Permissions.EXECUTE]: "Execute",
+      [Permissions.WRITE]: "Write",
+      [Permissions.READ]: "Read",
 
       // Named masks
-      [Permissions.ALL]: 'All permissions',
+      [Permissions.ALL]: "All permissions",
     };
   }
 }
diff --git a/tests/Fixtures/JsDumper/expected/needs_escaping_readable_enum.js b/tests/Fixtures/JsDumper/expected/needs_escaping_readable_enum.js
new file mode 100644
index 00000000..18408c9d
--- /dev/null
+++ b/tests/Fixtures/JsDumper/expected/needs_escaping_readable_enum.js
@@ -0,0 +1,11 @@
+class NeedsEscapingEnum extends ReadableEnum {
+  static APOSTROPHE = 'apostrophe'
+  static FORWARD_SLASH = 'forward_slash'
+
+  static get readables() {
+    return {
+      [NeedsEscapingEnum.APOSTROPHE]: "'",
+      [NeedsEscapingEnum.FORWARD_SLASH]: "/",
+    };
+  }
+}
diff --git a/tests/Fixtures/JsDumper/expected/readable_enum.js b/tests/Fixtures/JsDumper/expected/readable_enum.js
index fe60b54b..aca7282a 100644
--- a/tests/Fixtures/JsDumper/expected/readable_enum.js
+++ b/tests/Fixtures/JsDumper/expected/readable_enum.js
@@ -5,9 +5,9 @@ class Gender extends ReadableEnum {
 
   static get readables() {
     return {
-      [Gender.UNKNOW]: 'Unknown',
-      [Gender.MALE]: 'Male',
-      [Gender.FEMALE]: 'Female',
+      [Gender.UNKNOW]: "Unknown",
+      [Gender.MALE]: "Male",
+      [Gender.FEMALE]: "Female",
     };
   }
 }
diff --git a/tests/Unit/JsDumper/JsDumperTest.php b/tests/Unit/JsDumper/JsDumperTest.php
index 9d01c937..4bc8a616 100644
--- a/tests/Unit/JsDumper/JsDumperTest.php
+++ b/tests/Unit/JsDumper/JsDumperTest.php
@@ -12,6 +12,7 @@
 
 use Elao\Enum\JsDumper\JsDumper;
 use Elao\Enum\Tests\Fixtures\Enum\Gender;
+use Elao\Enum\Tests\Fixtures\Enum\NeedsEscapingEnum;
 use Elao\Enum\Tests\Fixtures\Enum\Permissions;
 use Elao\Enum\Tests\Fixtures\Enum\SimpleEnum;
 use Elao\Enum\Tests\TestCase;
@@ -148,6 +149,11 @@ public function provide testDumpEnumClass data(): iterable
             'expectationFilePath' => 'readable_enum.js',
         ];
 
+        yield 'readable enum which requires escaping' => [
+            'enumClass' => NeedsEscapingEnum::class,
+            'expectationFilePath' => 'needs_escaping_readable_enum.js',
+        ];
+
         yield 'flagged enum' => [
             'enumClass' => Permissions::class,
             'expectationFilePath' => 'flagged_enum.js',