diff --git a/package.json b/package.json
index dddeafa..e70de10 100644
--- a/package.json
+++ b/package.json
@@ -181,7 +181,7 @@
     "@vates/toggle-scripts": "1.0.0",
     "@vitest/coverage-v8": "3.2.3",
     "@vitest/ui": "3.2.3",
-    "chai": "5.3.1",
+    "chai": "6.0.1",
     "commander": "14.0.0",
     "cross-env": "10.0.0",
     "cspell": "9.2.0",
diff --git a/yarn.lock b/yarn.lock
index 69cbc33..125e2d0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1725,7 +1725,7 @@ __metadata:
     "@vates/toggle-scripts": "npm:1.0.0"
     "@vitest/coverage-v8": "npm:3.2.3"
     "@vitest/ui": "npm:3.2.3"
-    chai: "npm:5.3.1"
+    chai: "npm:6.0.1"
     commander: "npm:14.0.0"
     cross-env: "npm:10.0.0"
     cspell: "npm:9.2.0"
@@ -3896,7 +3896,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"chai@npm:5.3.1, chai@npm:^5.2.0":
+"chai@npm:6.0.1":
+  version: 6.0.1
+  resolution: "chai@npm:6.0.1"
+  checksum: 10/cd95aee5f98cdeaea3e24c21dcf1786d9eaf515d571861106a2378589cf5ef1ed3ddd223ca1121552656ffd744e4acd051f8881c1a9729c71551776db55fb2cb
+  languageName: node
+  linkType: hard
+
+"chai@npm:^5.2.0":
   version: 5.3.1
   resolution: "chai@npm:5.3.1"
   dependencies: