diff --git a/src/Lookup/TwitterLookup.php b/src/Lookup/TwitterLookup.php
index 4b78f49..4301598 100644
--- a/src/Lookup/TwitterLookup.php
+++ b/src/Lookup/TwitterLookup.php
@@ -14,7 +14,7 @@ final class TwitterLookup implements \Uiharu\ILookup {
     ];
 
     public function match(Url $url): bool {
-        if(!in_array($url->getHost(), self::TWITTER_DOMAINS))
+        if(!$url->isWeb() || !in_array($url->getHost(), self::TWITTER_DOMAINS))
             return false;
 
         return preg_match('#^/@?(?:[A-Za-z0-9_]{1,20})/status(?:es)?/([0-9]+)/?$#', $url->getPath())
diff --git a/src/Lookup/YouTubeLookup.php b/src/Lookup/YouTubeLookup.php
index 6414b0a..a90926d 100644
--- a/src/Lookup/YouTubeLookup.php
+++ b/src/Lookup/YouTubeLookup.php
@@ -36,6 +36,9 @@ final class YouTubeLookup implements \Uiharu\ILookup {
     }
 
     public function match(Url $url): bool {
+        if(!$url->isWeb())
+            return false;
+
         $urlHost = $url->getHost();
         if(self::isShortDomain($urlHost))
             return true;