diff --git a/package-lock.json b/package-lock.json
index 989feea3..a06e32e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,10 +19,11 @@
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
     "assert": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/assert/-/assert-1.4.1.tgz",
-      "integrity": "sha1-mZEtWRg2tab1s0XA8H7vwI/GXZE=",
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/assert/-/assert-1.5.0.tgz",
+      "integrity": "sha512-EDsgawzwoun2CZkCgtxJbv392v4nbk9XDD06zI+kQYoBM/3RBWLlEyJARDOmhAAosBjWACEkKL6S+lIZtcAubA==",
       "requires": {
+        "object-assign": "^4.1.1",
         "util": "0.10.3"
       }
     },
@@ -427,6 +428,11 @@
         "type-is": "^1.6.16"
       }
     },
+    "object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg=="
+    },
     "on-finished": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
@@ -574,7 +580,7 @@
     "util": {
       "version": "0.10.3",
       "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
-      "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
+      "integrity": "sha512-5KiHfsmkqacuKjkRkdV7SsfDJ2EGiPsK92s2MhNSY0craxjTdKTtqKsJaCWp4LW33ZZ0OPUv1WO/TFvNQRiQxQ==",
       "requires": {
         "inherits": "2.0.1"
       },
@@ -582,7 +588,7 @@
         "inherits": {
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz",
-          "integrity": "sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE="
+          "integrity": "sha512-8nWq2nLTAwd02jTqJExUYFSD/fKq6VH9Y/oG2accc/kdI0V98Bag8d5a4gi3XHz73rDWa2PvTtvcWYquKqSENA=="
         }
       }
     },
diff --git a/package.json b/package.json
index 9e05e16a..bebeb7a3 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   },
   "homepage": "https://github.com/johntango/circleciexpress#readme",
   "dependencies": {
-    "assert": "^1.4.1",
+    "assert": "^1.5.0",
     "chai": "^4.2.0",
     "express": "^4.16.4",
     "mocha": "^5.2.0",