diff --git a/pyproject.toml b/pyproject.toml
index 428df32..9adf164 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ classifiers = [
 ]
 dependencies = [
     "aiohttp >=3.13.0",
-    "anyio >=4.10.0",
+    "cyares[aiohttp,anyio,idna] >=0.4.0",
     "distributed >=2026.1.1",
     "filelock >=3.20.0",
     "hishel[fastapi,httpx,requests] >=1.1.5",
diff --git a/src/mahoraga/_core/_context.py b/src/mahoraga/_core/_context.py
index 6e625d8..f9b2cec 100644
--- a/src/mahoraga/_core/_context.py
+++ b/src/mahoraga/_core/_context.py
@@ -35,6 +35,7 @@
 
 import aiohttp
 import anyio
+import cyares.aiohttp
 import hishel.httpx
 import httpx
 import httpx_aiohttp
@@ -225,6 +226,9 @@ def get_client(self) -> aiohttp.ClientSession:
             keepalive_timeout=self.limits.keepalive_expiry,
             ssl=self.ssl_context,
             local_addr=(self.local_address, 0) if self.local_address else None,
+            resolver=cyares.aiohttp.CyAresResolver(
+                loop=asyncio.get_running_loop(),
+            ),
         )
         if _logger.isEnabledFor(logging.INFO):
             trace_config = aiohttp.TraceConfig()