diff --git a/packages/kuromojin-external-dict-loader/package-lock.json b/packages/kuromojin-external-dict-loader/package-lock.json
index 113eead..3353797 100644
--- a/packages/kuromojin-external-dict-loader/package-lock.json
+++ b/packages/kuromojin-external-dict-loader/package-lock.json
@@ -212,16 +212,16 @@
       "dev": true
     },
     "chai": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.2.0.tgz",
-      "integrity": "sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==",
+      "version": "4.3.3",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.3.tgz",
+      "integrity": "sha512-MPSLOZwxxnA0DhLE84klnGPojWFK5KuhP7/j5dTsxpr2S3XlkqJP5WbyYl1gCTWvG2Z5N+HD4F472WsbEZL6Pw==",
       "dev": true,
       "requires": {
         "assertion-error": "^1.1.0",
         "check-error": "^1.0.2",
         "deep-eql": "^3.0.1",
         "get-func-name": "^2.0.0",
-        "pathval": "^1.1.0",
+        "pathval": "^1.1.1",
         "type-detect": "^4.0.5"
       }
     },
@@ -1292,9 +1292,9 @@
       }
     },
     "pathval": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.0.tgz",
-      "integrity": "sha1-uULm1L3mUwBe9rcTYd74cn0GReA=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.1.tgz",
+      "integrity": "sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==",
       "dev": true
     },
     "picomatch": {
diff --git a/packages/kuromojin-external-dict-loader/package.json b/packages/kuromojin-external-dict-loader/package.json
index 3c80143..0a16892 100644
--- a/packages/kuromojin-external-dict-loader/package.json
+++ b/packages/kuromojin-external-dict-loader/package.json
@@ -32,7 +32,7 @@
     "url": "https://github.com/mobilusoss/textlint-browser-runner/issues"
   },
   "devDependencies": {
-    "chai": "4.2.0",
+    "chai": "4.3.3",
     "karma": "6.0.0",
     "karma-chai": "0.1.0",
     "karma-chrome-launcher": "3.1.0",