diff --git a/src/main/kotlin/mdnet/base/server/ImageServer.kt b/src/main/kotlin/mdnet/base/server/ImageServer.kt
index 13e1c88..dc7c633 100644
--- a/src/main/kotlin/mdnet/base/server/ImageServer.kt
+++ b/src/main/kotlin/mdnet/base/server/ImageServer.kt
@@ -104,7 +104,7 @@ class ImageServer(private val cache: DiskLruCache, private val statistics: Atomi
         val referer = request.header("Referer")
 
         handled.set(true)
-        if (referer != null && !referer.contains("mangadex.org")) {
+        if (referer != null && !referer.startsWith("https://mangadex.org")) {
             Response(Status.FORBIDDEN)
         } else if (snapshot != null && imageDatum != null) {
             request.handleCacheHit(sanitizedUri, getRc4(rc4Bytes), snapshot, imageDatum)