diff --git a/pyproject.toml b/pyproject.toml
index 55e8f7d..c011d7d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,7 @@ dependencies = [
     # Core dependencies for spoon-toolkits functionality
     "requests>=2.32.3",
     "aiohttp>=3.13.2",
+    "pycares>=4.9,<5.0",
     "fastmcp>=2.12.0",
     "pandas>=2.2.0",
     "httpx>=0.28.1",
diff --git a/requirements.txt b/requirements.txt
index f377110..c68bfea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 requests>=2.32.3
 aiohttp>=3.10.5
+pycares>=4.9,<5.0
 fastmcp>=2.12.0
 pandas>=1.0.0
 httpx>=0.28.1