diff --git a/build.gradle b/build.gradle
index 54baa889..4a2e05ce 100644
--- a/build.gradle
+++ b/build.gradle
@@ -38,7 +38,7 @@ kotlin {
 dependencies {
 	implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.1'
 	implementation 'com.squareup.okhttp3:okhttp:4.9.3'
-	implementation 'com.squareup.okio:okio:3.0.0'
+	implementation 'com.squareup.okio:okio:3.1.0'
 	implementation 'org.jsoup:jsoup:1.14.3'
 	implementation 'org.json:json:20220320'
 	implementation 'androidx.collection:collection-ktx:1.2.0'
diff --git a/kotatsu-parsers-ksp/build.gradle b/kotatsu-parsers-ksp/build.gradle
index 9ae06d1d..e6317098 100644
--- a/kotatsu-parsers-ksp/build.gradle
+++ b/kotatsu-parsers-ksp/build.gradle
@@ -3,5 +3,5 @@ plugins {
 }
 
 dependencies {
-	implementation 'com.google.devtools.ksp:symbol-processing-api:1.6.20-1.0.5'
+	implementation 'com.google.devtools.ksp:symbol-processing-api:1.6.21-1.0.5'
 }
\ No newline at end of file
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaLoaderContext.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaLoaderContext.kt
index 25fd49db..ed7f8498 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaLoaderContext.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/MangaLoaderContext.kt
@@ -41,6 +41,7 @@ abstract class MangaLoaderContext {
 	suspend fun httpPost(
 		url: String,
 		form: Map<String, String>,
+		headers: Headers? = null,
 	): Response {
 		val body = FormBody.Builder()
 		form.forEach { (k, v) ->
@@ -49,12 +50,16 @@ abstract class MangaLoaderContext {
 		val request = Request.Builder()
 			.post(body.build())
 			.url(url)
+		if (headers != null) {
+			request.headers(headers)
+		}
 		return httpClient.newCall(request.build()).await().ensureSuccess()
 	}
 
 	suspend fun httpPost(
 		url: String,
 		payload: String,
+		headers: Headers?,
 	): Response {
 		val body = FormBody.Builder()
 		payload.split('&').forEach {
@@ -68,6 +73,9 @@ abstract class MangaLoaderContext {
 		val request = Request.Builder()
 			.post(body.build())
 			.url(url)
+		if (headers != null) {
+			request.headers(headers)
+		}
 		return httpClient.newCall(request.build()).await().ensureSuccess()
 	}
 
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/GroupleParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/GroupleParser.kt
index 05ed85bc..0f9e1b53 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/GroupleParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/GroupleParser.kt
@@ -16,10 +16,10 @@ private const val PAGE_SIZE = 70
 private const val PAGE_SIZE_SEARCH = 50
 private const val NSFW_ALERT = "сексуальные сцены"
 
-internal abstract class GroupleParser(source: MangaSource) : MangaParser(source) {
+internal abstract class GroupleParser(source: MangaSource, userAgent: String) : MangaParser(source) {
 
 	private val headers = Headers.Builder()
-		.add("User-Agent", "readmangafun")
+		.add("User-Agent", userAgent)
 		.build()
 
 	override val sortOrders: Set<SortOrder> = EnumSet.of(
@@ -43,6 +43,7 @@ internal abstract class GroupleParser(source: MangaSource) : MangaParser(source)
 					"q" to query.urlEncoded(),
 					"offset" to (offset upBy PAGE_SIZE_SEARCH).toString(),
 				),
+				headers,
 			)
 			tags.isNullOrEmpty() -> context.httpGet(
 				"https://$domain/list?sortType=${
@@ -166,12 +167,17 @@ internal abstract class GroupleParser(source: MangaSource) : MangaParser(source)
 		val scripts = doc.select("script")
 		for (script in scripts) {
 			val data = script.html()
-			val pos = data.indexOf("rm_h.init")
+			val pos = data.indexOf("rm_h.initReader(")
 			if (pos == -1) {
 				continue
 			}
-			val json = data.substring(pos).substringAfter('(').substringBefore('\n')
+			val json = data.substring(pos)
+				.substringAfter('(')
+				.substringBefore('\n')
 				.substringBeforeLast(')')
+			if (json.isEmpty()) {
+				continue
+			}
 			val ja = JSONArray("[$json]")
 			val pages = ja.getJSONArray(1)
 			val servers = ja.getJSONArray(4).mapJSON { it.getString("path") }
@@ -199,11 +205,12 @@ internal abstract class GroupleParser(source: MangaSource) : MangaParser(source)
 		val headers = Headers.headersOf("Referer", page.referer)
 		for (server in servers) {
 			val url = server + path
-			if (context.httpHead(url, headers).isSuccessful) {
+			if (tryHead(url, headers)) {
 				return url
 			}
 		}
-		throw IllegalArgumentException("Cannot find any page url")
+		val fallbackServer = servers.firstOrNull() ?: parseFailed("Cannot find any page url")
+		return fallbackServer + path
 	}
 
 	override suspend fun getTags(): Set<MangaTag> {
@@ -263,6 +270,10 @@ internal abstract class GroupleParser(source: MangaSource) : MangaParser(source)
 		payload["s_sale"] = ""
 		payload["years"] = "1900,2099"
 		payload["+"] = "Искать".urlEncoded()
-		return context.httpPost(url, payload)
+		return context.httpPost(url, payload, headers)
 	}
+
+	private suspend fun tryHead(url: String, headers: Headers): Boolean = runCatching {
+		context.httpHead(url, headers).isSuccessful
+	}.getOrDefault(false)
 }
\ No newline at end of file
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MintMangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MintMangaParser.kt
index 8e198469..f30cdadc 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MintMangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/MintMangaParser.kt
@@ -6,7 +6,9 @@ import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.model.MangaSource
 
 @MangaSourceParser("MINTMANGA", "MintManga", "ru")
-internal class MintMangaParser(override val context: MangaLoaderContext) : GroupleParser(MangaSource.MINTMANGA) {
+internal class MintMangaParser(
+	override val context: MangaLoaderContext,
+) : GroupleParser(MangaSource.MINTMANGA, "mintmangafun") {
 
 	override val configKeyDomain = ConfigKey.Domain(
 		"mintmanga.live",
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ReadmangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ReadmangaParser.kt
index 5cd27116..31d98a7d 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ReadmangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/ReadmangaParser.kt
@@ -6,7 +6,9 @@ import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.model.MangaSource
 
 @MangaSourceParser("READMANGA_RU", "ReadManga", "ru")
-internal class ReadmangaParser(override val context: MangaLoaderContext) : GroupleParser(MangaSource.READMANGA_RU) {
+internal class ReadmangaParser(
+	override val context: MangaLoaderContext,
+) : GroupleParser(MangaSource.READMANGA_RU, "readmangafun") {
 
 	override val configKeyDomain = ConfigKey.Domain(
 		"readmanga.io",
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/SelfMangaParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/SelfMangaParser.kt
index e00889e5..6a6280f8 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/SelfMangaParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/SelfMangaParser.kt
@@ -6,7 +6,9 @@ import org.koitharu.kotatsu.parsers.config.ConfigKey
 import org.koitharu.kotatsu.parsers.model.MangaSource
 
 @MangaSourceParser("SELFMANGA", "SelfManga", "ru")
-internal class SelfMangaParser(override val context: MangaLoaderContext) : GroupleParser(MangaSource.SELFMANGA) {
+internal class SelfMangaParser(
+	override val context: MangaLoaderContext,
+) : GroupleParser(MangaSource.SELFMANGA, "selfmangafun") {
 
 	override val configKeyDomain = ConfigKey.Domain("selfmanga.live", null)
 }
\ No newline at end of file