diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
index d5286443..d761564f 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/RemangaParser.kt
@@ -1,13 +1,16 @@
 package org.koitharu.kotatsu.parsers.site
 
 import okhttp3.Headers
+import okhttp3.Response
 import org.json.JSONArray
 import org.json.JSONException
 import org.json.JSONObject
+import org.jsoup.HttpStatusException
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaParser
 import org.koitharu.kotatsu.parsers.MangaParserAuthProvider
 import org.koitharu.kotatsu.parsers.config.ConfigKey
+import org.koitharu.kotatsu.parsers.exception.AuthRequiredException
 import org.koitharu.kotatsu.parsers.exception.ParseException
 import org.koitharu.kotatsu.parsers.model.*
 import org.koitharu.kotatsu.parsers.util.*
@@ -15,6 +18,7 @@ import org.koitharu.kotatsu.parsers.util.json.getStringOrNull
 import org.koitharu.kotatsu.parsers.util.json.mapJSON
 import org.koitharu.kotatsu.parsers.util.json.mapJSONTo
 import org.koitharu.kotatsu.parsers.util.json.mapJSONToSet
+import java.net.HttpURLConnection
 import java.net.URLDecoder
 import java.text.DateFormat
 import java.text.SimpleDateFormat
@@ -109,10 +113,12 @@ internal class RemangaParser(
 		val domain = getDomain()
 		val slug = manga.url.find(regexLastUrlPath)
 			?: throw ParseException("Cannot obtain slug from ${manga.url}")
-		val data = context.httpGet(
-			url = "https://api.$domain/api/titles/$slug/",
-			headers = getApiHeaders(),
-		).parseJson()
+		val data = catch401 {
+			context.httpGet(
+				url = "https://api.$domain/api/titles/$slug/",
+				headers = getApiHeaders(),
+			)
+		}.parseJson()
 		val content = try {
 			data.getJSONObject("content")
 		} catch (e: JSONException) {
@@ -166,7 +172,9 @@ internal class RemangaParser(
 
 	override suspend fun getPages(chapter: MangaChapter): List<MangaPage> {
 		val referer = "https://${getDomain()}/"
-		val content = context.httpGet(chapter.url.withDomain(subdomain = "api"), getApiHeaders()).parseJson()
+		val content = catch401 {
+			context.httpGet(chapter.url.withDomain(subdomain = "api"), getApiHeaders())
+		}.parseJson()
 			.getJSONObject("content")
 		val pages = content.optJSONArray("pages")
 		if (pages == null) {
@@ -205,10 +213,12 @@ internal class RemangaParser(
 	}
 
 	override suspend fun getUsername(): String {
-		val jo = context.httpGet(
-			url = "https://api.${getDomain()}/api/users/current/",
-			headers = getApiHeaders(),
-		).parseJson()
+		val jo = catch401 {
+			context.httpGet(
+				url = "https://api.${getDomain()}/api/users/current/",
+				headers = getApiHeaders(),
+			)
+		}.parseJson()
 		return jo.getJSONObject("content").getString("username")
 	}
 
@@ -246,10 +256,12 @@ internal class RemangaParser(
 		val result = ArrayList<JSONObject>(100)
 		var page = 1
 		while (true) {
-			val content = context.httpGet(
-				url = "https://api.$domain/api/titles/chapters/?branch_id=$branchId&page=$page&count=100",
-				headers = getApiHeaders(),
-			).parseJson().getJSONArray("content")
+			val content = catch401 {
+				context.httpGet(
+					url = "https://api.$domain/api/titles/chapters/?branch_id=$branchId&page=$page&count=100",
+					headers = getApiHeaders(),
+				)
+			}.parseJson().getJSONArray("content")
 			val len = content.length()
 			if (len == 0) {
 				break
@@ -262,4 +274,14 @@ internal class RemangaParser(
 		}
 		return result
 	}
+
+	private inline fun catch401(block: () -> Response): Response = try {
+		block()
+	} catch (e: HttpStatusException) {
+		if (e.statusCode == HttpURLConnection.HTTP_UNAUTHORIZED) {
+			throw AuthRequiredException(source)
+		} else {
+			throw e
+		}
+	}
 }
\ No newline at end of file
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/util/ContinuationCallCallback.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/ContinuationCallCallback.kt
new file mode 100644
index 00000000..599dba87
--- /dev/null
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/ContinuationCallCallback.kt
@@ -0,0 +1,36 @@
+package org.koitharu.kotatsu.parsers.util
+
+import kotlinx.coroutines.CancellableContinuation
+import kotlinx.coroutines.CompletionHandler
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.Response
+import java.io.IOException
+import kotlin.coroutines.resume
+import kotlin.coroutines.resumeWithException
+
+internal class ContinuationCallCallback(
+	private val call: Call,
+	private val continuation: CancellableContinuation<Response>,
+) : Callback, CompletionHandler {
+
+	override fun onResponse(call: Call, response: Response) {
+		if (continuation.isActive) {
+			continuation.resume(response)
+		}
+	}
+
+	override fun onFailure(call: Call, e: IOException) {
+		if (!call.isCanceled() && continuation.isActive) {
+			continuation.resumeWithException(e)
+		}
+	}
+
+	override fun invoke(cause: Throwable?) {
+		runCatching {
+			call.cancel()
+		}.onFailure { e ->
+			cause?.addSuppressed(e)
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/util/HttpExt.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/HttpExt.kt
index 01b73a2a..a84d62fb 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/util/HttpExt.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/util/HttpExt.kt
@@ -2,31 +2,12 @@ package org.koitharu.kotatsu.parsers.util
 
 import kotlinx.coroutines.suspendCancellableCoroutine
 import okhttp3.Call
-import okhttp3.Callback
 import okhttp3.Response
-import java.io.IOException
-import kotlin.coroutines.resume
-import kotlin.coroutines.resumeWithException
 
-suspend fun Call.await() = suspendCancellableCoroutine<Response> { cont ->
-	this.enqueue(
-		object : Callback {
-			override fun onFailure(call: Call, e: IOException) {
-				if (cont.isActive) {
-					cont.resumeWithException(e)
-				}
-			}
-
-			override fun onResponse(call: Call, response: Response) {
-				if (cont.isActive) {
-					cont.resume(response)
-				}
-			}
-		},
-	)
-	cont.invokeOnCancellation {
-		this.cancel()
-	}
+suspend fun Call.await(): Response = suspendCancellableCoroutine { continuation ->
+	val callback = ContinuationCallCallback(this, continuation)
+	enqueue(callback)
+	continuation.invokeOnCancellation(callback)
 }
 
 val Response.mimeType: String?