diff --git a/src/fgai/graylog_mcp.py b/src/fgai/graylog_mcp.py
index f1e7799..8898854 100644
--- a/src/fgai/graylog_mcp.py
+++ b/src/fgai/graylog_mcp.py
@@ -66,7 +66,7 @@ class GraylogMcpClient:
     def probe(self) -> dict[str, object]:
         initialized = self._call(
             "initialize",
-            {"protocolVersion": "2025-03-26", "capabilities": {}, "clientInfo": {"name": "fgAI", "version": "0.1"}},
+            {"protocolVersion": "2025-06-18", "capabilities": {}, "clientInfo": {"name": "fgAI", "version": "0.1"}},
         )
         self._call("notifications/initialized", notification=True)
         tools = self._call("tools/list")