diff --git a/package-lock.json b/package-lock.json
index 0eacb60..47e55ba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "APACHE-2.0",
       "dependencies": {
         "@slack/web-api": "^7.3.4",
-        "chai": "^5.2.1",
+        "chai": "^6.0.0",
         "form-data": "^4.0.4",
         "mocha": "^11.7.1",
         "mocha-junit-reporter": "^2.2.1",
@@ -282,15 +282,6 @@
         "node": ">=0.10.0"
       }
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-    "node_modules/assertion-error": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
-      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      }
-    },
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       "version": "0.13.4",
       "resolved": "https://registry.npmjs.org/ast-types/-/ast-types-0.13.4.tgz",
@@ -472,17 +463,10 @@
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-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-5.2.1.tgz",
-      "integrity": "sha512-5nFxhUrX0PqtyogoYOA8IPswy5sZFTOsBFl/9bNsmDLgsxYTzSZQJDPppDnZPTQbzSEm0hqGjWPzRemQCYbD6A==",
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.0.0.tgz",
+      "integrity": "sha512-a1Td/S+R4gegQ1aQhi9V2KP5uAQFaoZCRhKSw/UWDbwaB192HEP6eeczJKA/rSAwnEgRpNCdAdulDPhgvt3z4Q==",
       "license": "MIT",
-      "dependencies": {
-        "assertion-error": "^2.0.1",
-        "check-error": "^2.1.1",
-        "deep-eql": "^5.0.1",
-        "loupe": "^3.1.0",
-        "pathval": "^2.0.0"
-      },
       "engines": {
         "node": ">=18"
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@@ -524,15 +508,6 @@
         "node": "*"
       }
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-    "node_modules/check-error": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/check-error/-/check-error-2.1.1.tgz",
-      "integrity": "sha512-OAlb+T7V4Op9OwdkjmguYRqncdlx5JiofwOAUkmTF+jNdHwzTaTs4sRAGpzLF3oOz5xAyDGrPgeIDFQmDOTiJw==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 16"
-      }
-    },
     "node_modules/chokidar": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.3.tgz",
@@ -731,15 +706,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
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-    "node_modules/deep-eql": {
-      "version": "5.0.2",
-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-5.0.2.tgz",
-      "integrity": "sha512-h5k/5U50IJJFpzfL6nO9jaaumfjO/f2NjK/oYB2Djzm4p9L+3T9qWpZqZ2hAbLPuuYq9wrU08WQyBTL5GbPk5Q==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/deepmerge": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.3.1.tgz",
@@ -1578,12 +1544,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/loupe": {
-      "version": "3.1.3",
-      "resolved": "https://registry.npmjs.org/loupe/-/loupe-3.1.3.tgz",
-      "integrity": "sha512-kkIp7XSkP78ZxJEsSxW3712C6teJVoeHHwgo9zJ380de7IYyJ2ISlxojcH2pC5OFLewESmnRi/+XCDIEEVyoug==",
-      "license": "MIT"
-    },
     "node_modules/lru-cache": {
       "version": "7.18.3",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-7.18.3.tgz",
@@ -1993,15 +1953,6 @@
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       "license": "ISC"
     },
-    "node_modules/pathval": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/pathval/-/pathval-2.0.0.tgz",
-      "integrity": "sha512-vE7JKRyES09KiunauX7nd2Q9/L7lhok4smP9RZTDeD4MVs72Dp2qNFVz39Nz5a0FVEW0BJR6C0DYrq6unoziZA==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 14.16"
-      }
-    },
     "node_modules/pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
diff --git a/package.json b/package.json
index 92776bd..69946f7 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "license": "APACHE-2.0",
   "dependencies": {
     "@slack/web-api": "^7.3.4",
-    "chai": "^5.2.1",
+    "chai": "^6.0.0",
     "form-data": "^4.0.4",
     "mocha": "^11.7.1",
     "mocha-junit-reporter": "^2.2.1",