diff --git a/package-lock.json b/package-lock.json
index dc2c433..eb229e3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "balanced-match": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
     "brace-expansion": {
@@ -27,9 +27,9 @@
       "dev": true
     },
     "diff": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-1.0.8.tgz",
-      "integrity": "sha1-NDJ2MI7Jkbe8giZ+1VvBQR+XFmY=",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
+      "integrity": "sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==",
       "dev": true
     },
     "eyes": {
@@ -45,9 +45,9 @@
       "dev": true
     },
     "glob": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
-      "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
+      "version": "7.1.7",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
+      "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
       "dev": true,
       "requires": {
         "fs.realpath": "^1.0.0",
@@ -69,9 +69,9 @@
       }
     },
     "inherits": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
-      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
       "dev": true
     },
     "luxon": {
@@ -125,12 +125,12 @@
       "dev": true
     },
     "vows": {
-      "version": "0.8.2",
-      "resolved": "https://registry.npmjs.org/vows/-/vows-0.8.2.tgz",
-      "integrity": "sha1-aR95qybM3oC6cm3en+yOc9a88us=",
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/vows/-/vows-0.8.3.tgz",
+      "integrity": "sha512-PVIxa/ovXhrw5gA3mz6M+ZF3PHlqX4tutR2p/y9NWPAaFVKcWBE8b2ktfr0opQM/qFmcOVWKjSCJVjnYOvjXhw==",
       "dev": true,
       "requires": {
-        "diff": "~1.0.8",
+        "diff": "^4.0.1",
         "eyes": "~0.1.6",
         "glob": "^7.1.2"
       }
diff --git a/package.json b/package.json
index dec1a39..e27a853 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "rrule": "2.6.8"
   },
   "devDependencies": {
-    "vows": "0.8.2",
+    "vows": "0.8.3",
     "underscore": "1.13.1"
   },
   "scripts": {