diff --git a/src/main/java/net/lamgc/cgj/pixiv/PixivURL.java b/src/main/java/net/lamgc/cgj/pixiv/PixivURL.java
index 0826a27..b0bd4fb 100644
--- a/src/main/java/net/lamgc/cgj/pixiv/PixivURL.java
+++ b/src/main/java/net/lamgc/cgj/pixiv/PixivURL.java
@@ -336,7 +336,7 @@ public class PixivURL {
          * @return 如果支持返回true
          */
         public boolean isSupportedMode(RankingMode mode) {
-            return Arrays.binarySearch(supportedMode, mode) < 0;
+            return Arrays.binarySearch(supportedMode, mode) >= 0;
         }
 
     }