diff --git a/requirements.txt b/requirements.txt
index a5cb67a..3ca1bf3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 bilibili-api-python>=17.0.0
 aiohttp>=3.9.0
-mcp>=1.0.0
+mcp>=1.0.0,<2.0.0
diff --git a/tests/test_requirements.py b/tests/test_requirements.py
new file mode 100644
index 0000000..1018e57
--- /dev/null
+++ b/tests/test_requirements.py
@@ -0,0 +1,18 @@
+import re
+import unittest
+from pathlib import Path
+
+
+class RequirementsTest(unittest.TestCase):
+    def test_mcp_requirement_excludes_sdk_2(self):
+        requirements = Path(__file__).parents[1] / "requirements.txt"
+        mcp_line = next(
+            line for line in requirements.read_text().splitlines()
+            if re.match(r"^mcp(?:[<>=!~]|$)", line)
+        )
+
+        self.assertRegex(mcp_line, r"mcp>=1\.0\.0,<2(?:\.0\.0)?")
+
+
+if __name__ == "__main__":
+    unittest.main()