diff --git a/package.json b/package.json
index 8f8899828a..734a16d78b 100644
--- a/package.json
+++ b/package.json
@@ -197,7 +197,7 @@
         "prettier": "3.7.4",
         "remark-parse": "11.0.0",
         "supertest": "7.1.4",
-        "tsdown": "0.17.4",
+        "tsdown": "0.18.0",
         "typescript": "5.9.3",
         "unified": "11.0.5",
         "vite-tsconfig-paths": "6.0.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ff5ac0d126..45b9f299be 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -445,8 +445,8 @@ importers:
         specifier: 7.1.4
         version: 7.1.4
       tsdown:
-        specifier: 0.17.4
-        version: 0.17.4(synckit@0.11.11)(typescript@5.9.3)
+        specifier: 0.18.0
+        version: 0.18.0(synckit@0.11.11)(typescript@5.9.3)
       typescript:
         specifier: 5.9.3
         version: 5.9.3
@@ -5810,10 +5810,9 @@ packages:
       typescript:
         optional: true
 
-  tsdown@0.17.4:
-    resolution: {integrity: sha512-z+kNuv1rwM1POQIufDUVrdNc/uGy0ueRVafCyDH39IdHxin4JXgB8DNGSPoqdIpcOpqUoRbNreK8NxENFmlhKw==}
+  tsdown@0.18.0:
+    resolution: {integrity: sha512-Yotdh3NzizysnqR96xfpHFYtEntk1cZvSRHz8A+Pn3ZHNdTQa4fBQxh6HHzWZwfjdQv47xb7GCv6vEWMtxBirw==}
     engines: {node: '>=20.19.0'}
-    deprecated: Including an unexpected breaking change (copy behavior)
     hasBin: true
     peerDependencies:
       '@arethetypeswrong/core': ^0.18.1
@@ -9602,7 +9601,7 @@ snapshots:
   eslint-compat-utils@0.5.1(eslint@9.39.2(jiti@2.6.1)):
     dependencies:
       eslint: 9.39.2(jiti@2.6.1)
-      semver: 7.7.2
+      semver: 7.7.3
 
   eslint-compat-utils@0.6.5(eslint@9.39.2(jiti@2.6.1)):
     dependencies:
@@ -12236,7 +12235,7 @@ snapshots:
     optionalDependencies:
       typescript: 5.9.3
 
-  tsdown@0.17.4(synckit@0.11.11)(typescript@5.9.3):
+  tsdown@0.18.0(synckit@0.11.11)(typescript@5.9.3):
     dependencies:
       ansis: 4.2.0
       cac: 6.7.14