diff --git a/.github/diy/packages/luci-app-passwall/root/usr/share/passwall/adblock.sh b/.github/diy/packages/luci-app-passwall/root/usr/share/passwall/adblock.sh
index 0841ea42..bda49e0b 100644
--- a/.github/diy/packages/luci-app-passwall/root/usr/share/passwall/adblock.sh
+++ b/.github/diy/packages/luci-app-passwall/root/usr/share/passwall/adblock.sh
@@ -60,7 +60,7 @@ process_url() {
 			if (fmt == "" && $0 ~ /^\|\|[a-zA-Z0-9]/)         fmt = "adguard"
 			if (fmt == "" && $0 ~ /^(0\.0\.0\.0|127\.0\.0\.1)[[:space:]]/)
                 fmt = "hosts"
-            if (fmt == "" && $0 ~ /^[a-zA-Z0-9]([a-zA-Z0-9\-]*[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9\-]*[a-zA-Z0-9])?)+$/)
+            if (fmt == "" && $0 ~ /^[a-zA-Z0-9]([a-zA-Z0-9.\-]*[a-zA-Z0-9])?\.[a-zA-Z]{2,}$/)
                 fmt = "plain"
         }