diff --git a/app/src/main/java/eu/kanade/tachiyomi/network/CloudflareInterceptor.kt b/app/src/main/java/eu/kanade/tachiyomi/network/CloudflareInterceptor.kt
index d517a9e4c8..5b2cccde2c 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/network/CloudflareInterceptor.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/network/CloudflareInterceptor.kt
@@ -89,7 +89,8 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
         var isWebViewOutdated = false
 
         val origRequestUrl = request.url.toString()
-        val headers = request.headers.toMultimap().mapValues { it.value.getOrNull(0) ?: "" }
+        val headers = request.headers.toMultimap().mapValues { it.value.getOrNull(0) ?: "" }.toMutableMap()
+        headers["X-Requested-With"] = WebViewUtil.REQUESTED_WITH
 
         handler.post {
             val webview = WebView(context)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewActivity.kt
index ea94582d1d..89b7933f9b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/webview/WebViewActivity.kt
@@ -70,13 +70,14 @@ class WebViewActivity : BaseActivity<WebviewActivityBinding>() {
 
         if (bundle == null) {
             val url = intent.extras!!.getString(URL_KEY) ?: return
-            var headers = emptyMap<String, String>()
 
+            var headers = mutableMapOf<String, String>()
             val source = sourceManager.get(intent.extras!!.getLong(SOURCE_KEY)) as? HttpSource
             if (source != null) {
-                headers = source.headers.toMultimap().mapValues { it.value.getOrNull(0) ?: "" }
+                headers = source.headers.toMultimap().mapValues { it.value.getOrNull(0) ?: "" }.toMutableMap()
                 binding.webview.settings.userAgentString = source.headers["User-Agent"]
             }
+            headers["X-Requested-With"] = WebViewUtil.REQUESTED_WITH
 
             binding.webview.setDefaultSettings()
 
@@ -100,9 +101,7 @@ class WebViewActivity : BaseActivity<WebviewActivityBinding>() {
 
             binding.webview.webViewClient = object : WebViewClientCompat() {
                 override fun shouldOverrideUrlCompat(view: WebView, url: String): Boolean {
-                    val android_browser: MutableMap<String, String> = HashMap()
-                    android_browser["X-Requested-With"] = "com.android.browser"
-                    view.loadUrl(url,android_browser)
+                    view.loadUrl(url, headers)
                     return true
                 }
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt b/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
index b92866e463..8527c65394 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
@@ -11,6 +11,8 @@ object WebViewUtil {
         Regex(""".*Chrome/(\d+)\..*""")
     }
 
+    const val REQUESTED_WITH = "com.android.browser"
+
     const val MINIMUM_WEBVIEW_VERSION = 80
 
     fun supportsWebView(context: Context): Boolean {