diff --git a/pyproject.toml b/pyproject.toml
index f1019a5..96460aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ authors = [{ name = "Tengu Contributors" }]
 dependencies = [
     "fastmcp>=2.0",
     "pydantic>=2.7",
-    "structlog>=24.0",
+    "structlog>=25.5.0",
     "httpx>=0.27",
     "dnspython>=2.6",
     "python-whois>=0.9",