diff --git a/package-lock.json b/package-lock.json
index 140024b3..99e84257 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -312,6 +312,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -323,6 +324,7 @@
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
           "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
           "dev": true,
+          "optional": true,
           "requires": {
             "is-buffer": "^1.1.5"
           }
@@ -441,9 +443,9 @@
       "dev": true
     },
     "assert-rejects": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/assert-rejects/-/assert-rejects-0.1.1.tgz",
-      "integrity": "sha1-5HozNdiULHLj7NlGJh8OWKDaLvY=",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/assert-rejects/-/assert-rejects-1.0.0.tgz",
+      "integrity": "sha512-xSmDqs5YxfrHUQBhVfrP/5+UoEvMBTY2+oRDoLfY9zsTA1hnW0KiKYcXKyeVWSgb0UpsQ4gyeBuKlXKzKUobZA==",
       "dev": true,
       "requires": {
         "is-regexp": "^1.0.0"
@@ -3300,7 +3302,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
       "version": "1.4.0",
@@ -6883,6 +6886,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -8065,7 +8069,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
diff --git a/package.json b/package.json
index ed19c8be..9c5dea35 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "@types/lodash": "4.14.116",
     "@types/mocha": "5.2.5",
     "@types/power-assert": "1.5.0",
-    "assert-rejects": "0.1.1",
+    "assert-rejects": "1.0.0",
     "jscpd": "0.6.22",
     "mocha": "5.2.0",
     "nyc": "11.9.0",