diff --git a/.gitignore b/.gitignore
index d32290ef4..700c700fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,4 +13,3 @@ node_modules/
 /app/google
 /app/gradle.properties
 package-lock.json
-18PlusList.txt
diff --git a/app/src/main/assets/18PlusList.txt b/app/src/main/assets/18PlusList.txt
new file mode 100644
index 000000000..7776c3b14
--- /dev/null
+++ b/app/src/main/assets/18PlusList.txt
@@ -0,0 +1,2 @@
+OGN5dS5jb20=
+c2cwMC54eXo=
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/SourceHelp.kt b/app/src/main/java/io/legado/app/help/SourceHelp.kt
index 4cd1ca831..bdb883b10 100644
--- a/app/src/main/java/io/legado/app/help/SourceHelp.kt
+++ b/app/src/main/java/io/legado/app/help/SourceHelp.kt
@@ -3,8 +3,9 @@ package io.legado.app.help
 import android.os.Handler
 import android.os.Looper
 import io.legado.app.App
-import io.legado.app.data.entities.BookSource
 import io.legado.app.data.entities.RssSource
+import io.legado.app.utils.EncoderUtils
+import io.legado.app.utils.NetworkUtils
 import io.legado.app.utils.splitNotBlank
 import org.jetbrains.anko.toast
 
@@ -32,17 +33,20 @@ object SourceHelp {
         }
     }
 
-    fun insertBookSource(vararg bookSources: BookSource) {
-        App.db.bookSourceDao().insert(*bookSources)
-    }
-
     private fun is18Plus(url: String?): Boolean {
         url ?: return false
         if (AppConfig.isGooglePlay) return false
-        list18Plus.forEach {
-            if (url.contains(it)) {
-                return true
+        val baseUrl = NetworkUtils.getBaseUrl(url)
+        baseUrl ?: return false
+        try {
+            val host = baseUrl.split("//", ".")
+            val base64Url = EncoderUtils.base64Encode("${host[host.lastIndex - 1]}.${host.last()}")
+            list18Plus.forEach {
+                if (base64Url == it) {
+                    return true
+                }
             }
+        } catch (e: Exception) {
         }
         return false
     }