diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/ExHentaiParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/ExHentaiParser.kt
index 84a6ee10..076250b4 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/ExHentaiParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/ExHentaiParser.kt
@@ -6,6 +6,7 @@ import androidx.collection.set
 import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import okhttp3.Interceptor
 import okhttp3.Response
+import okhttp3.internal.closeQuietly
 import okhttp3.internal.headersContentLength
 import org.jsoup.internal.StringUtil
 import org.jsoup.nodes.Element
@@ -284,10 +285,11 @@ internal class ExHentaiParser(
 		val response = chain.proceed(chain.request())
 		if (response.headersContentLength() <= 256) {
 			val text = response.peekBody(256).string()
-			if (text.startsWith("Your IP address has been temporarily banned")) {
+			if (text.startsWith("Your IP address has been temporarily banned", ignoreCase = true)) {
 				val hours = Regex("([0-9]+) hours?").find(text)?.groupValues?.getOrNull(1)?.toLongOrNull() ?: 0
 				val minutes = Regex("([0-9]+) minutes?").find(text)?.groupValues?.getOrNull(1)?.toLongOrNull() ?: 0
 				val seconds = Regex("([0-9]+) seconds?").find(text)?.groupValues?.getOrNull(1)?.toLongOrNull() ?: 0
+				response.closeQuietly()
 				throw TooManyRequestExceptions(
 					url = response.request.url.toString(),
 					retryAfter = TimeUnit.HOURS.toMillis(hours)
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaFireParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaFireParser.kt
index ae2b53dc..06fe8ce1 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaFireParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaFireParser.kt
@@ -406,9 +406,8 @@ internal abstract class MangaFireParser(
 			return response
 		}
 
-		val offset = request.url.fragment!!.substringAfter("_").toInt()
-
 		return context.redrawImageResponse(response) { bitmap ->
+			val offset = request.url.fragment!!.substringAfter("_").toInt()
 			val width = bitmap.width
 			val height = bitmap.height
 
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaPlusParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaPlusParser.kt
index 601e5092..ef20be77 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaPlusParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/MangaPlusParser.kt
@@ -227,14 +227,11 @@ internal abstract class MangaPlusParser(
 			return response
 		}
 
-		val contentType = response.headers["Content-Type"] ?: "image/jpeg"
-
-		val image = requireNotNull(response.body).bytes().decodeXorCipher(encryptionKey)
-		val body = image.toResponseBody(contentType.toMediaTypeOrNull())
-
-		return response.newBuilder()
-			.body(body)
-			.build()
+		return response.map { responseBody ->
+			val contentType = response.headers["Content-Type"] ?: "image/jpeg"
+			val image = responseBody.bytes().decodeXorCipher(encryptionKey)
+			image.toResponseBody(contentType.toMediaTypeOrNull())
+		}
 	}
 
 	private fun ByteArray.decodeXorCipher(key: String): ByteArray {
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LuratoonScansParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LuratoonScansParser.kt
index 2f28045a..e58848ab 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LuratoonScansParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/pt/LuratoonScansParser.kt
@@ -128,9 +128,11 @@ internal class LuratoonScansParser(context: MangaLoaderContext) :
 	override fun intercept(chain: Interceptor.Chain): Response {
 		val response = chain.proceed(chain.request())
 		if (response.mimeType == "application/octet-stream") {
-			val (bytes, name) = ZipInputStream(checkNotNull(response.body).byteStream()).use {
-				val entry = it.nextEntry
-				it.readBytes() to entry?.name
+			val (bytes, name) = response.use { resp ->
+				ZipInputStream(resp.requireBody().byteStream()).use {
+					val entry = it.nextEntry
+					it.readBytes() to entry?.name
+				}
 			}
 			val type = if (name?.endsWith(".avif", ignoreCase = true) == true) {
 				"image/avif"
diff --git a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/CuuTruyenParser.kt b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/CuuTruyenParser.kt
index 3018bd21..c6f5bc1a 100644
--- a/src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/CuuTruyenParser.kt
+++ b/src/main/kotlin/org/koitharu/kotatsu/parsers/site/vi/CuuTruyenParser.kt
@@ -189,8 +189,8 @@ internal class CuuTruyenParser(context: MangaLoaderContext) :
 			return response
 		}
 
-		val drmData = fragment.substringAfter(DRM_DATA_KEY)
 		return context.redrawImageResponse(response) { bitmap ->
+			val drmData = fragment.substringAfter(DRM_DATA_KEY)
 			unscrambleImage(bitmap, drmData)
 		}
 	}