diff --git a/package-lock.json b/package-lock.json
index c4e9458..52448d0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@senthiljruby/inwords",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -253,14 +253,17 @@
       "dev": true
     },
     "chai": {
-      "version": "3.5.0",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-3.5.0.tgz",
-      "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.4.tgz",
+      "integrity": "sha512-yS5H68VYOCtN1cjfwumDSuzn/9c+yza4f3reKXlE5rUg7SFcCEy90gJvydNgOYtblyf4Zi6jIWRnXOgErta0KA==",
       "dev": true,
       "requires": {
-        "assertion-error": "^1.0.1",
-        "deep-eql": "^0.1.3",
-        "type-detect": "^1.0.0"
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.1",
+        "type-detect": "^4.0.5"
       }
     },
     "chalk": {
@@ -282,6 +285,12 @@
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
       "dev": true
     },
+    "check-error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII=",
+      "dev": true
+    },
     "circular-json": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
@@ -394,20 +403,12 @@
       "dev": true
     },
     "deep-eql": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-0.1.3.tgz",
-      "integrity": "sha1-71WKyrjeJSBs1xOQbXTlaTDrafI=",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
       "dev": true,
       "requires": {
-        "type-detect": "0.1.1"
-      },
-      "dependencies": {
-        "type-detect": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-0.1.1.tgz",
-          "integrity": "sha1-C6XsKohWQORw6k6FBZcZANrFiCI=",
-          "dev": true
-        }
+        "type-detect": "^4.0.0"
       }
     },
     "deep-is": {
@@ -899,6 +900,12 @@
       "integrity": "sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=",
       "dev": true
     },
+    "get-func-name": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.0.tgz",
+      "integrity": "sha1-6td0q+5y4gQJQzoGY2YCPdaIekE=",
+      "dev": true
+    },
     "get-stdin": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-6.0.0.tgz",
@@ -1746,6 +1753,12 @@
         "pify": "^2.0.0"
       }
     },
+    "pathval": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.1.tgz",
+      "integrity": "sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==",
+      "dev": true
+    },
     "pify": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -2279,9 +2292,9 @@
       }
     },
     "type-detect": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-1.0.0.tgz",
-      "integrity": "sha1-diIXzAbbJY7EiQihKY6LlRIejqI=",
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
       "dev": true
     },
     "typedarray": {
diff --git a/package.json b/package.json
index 6ef10ed..5bdf61c 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "chai": "^3.5.0",
+    "chai": "^4.3.4",
     "istanbul": "^1.1.0-alpha.1",
     "mocha": "^5.2.0",
     "semistandard": "^12.0.1"