diff --git a/package-lock.json b/package-lock.json
index 807fabd..358150b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -121,9 +121,9 @@
       "dev": true
     },
     "@types/chai": {
-      "version": "4.1.7",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.1.7.tgz",
-      "integrity": "sha512-2Y8uPt0/jwjhQ6EiluT0XCri1Dbplr0ZxfFXUz+ye13gaqE8u5gL5ppao1JrUYr9cIip5S6MvQzBS7Kke7U9VA==",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.1.tgz",
+      "integrity": "sha512-LDKlQW/V8bQr5p9aoHye9p7x9faxq0GVeWAkn/Zgyyn848LIAzuR1sHQjGmUBFUpINuGWDG2NTM/ofA2aLMIew==",
       "dev": true
     },
     "@types/connect": {
@@ -905,7 +905,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1320,7 +1321,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1376,6 +1378,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1419,12 +1422,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
diff --git a/package.json b/package.json
index 20fdd3c..b6f8973 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "@angular/compiler-cli": "7.1.1",
-    "@types/chai": "4.1.7",
+    "@types/chai": "4.2.1",
     "@types/meteor": "1.4.23",
     "@types/mocha": "5.2.5",
     "@types/sinon": "5.0.7",