diff --git a/package-lock.json b/package-lock.json
index f936026..4f7c9c9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -197,9 +197,9 @@
             "dev": true
         },
         "acorn": {
-            "version": "7.1.1",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
-            "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
+            "version": "7.2.0",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.2.0.tgz",
+            "integrity": "sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==",
             "dev": true
         },
         "acorn-walk": {
@@ -333,9 +333,9 @@
             "dev": true
         },
         "ava": {
-            "version": "3.8.1",
-            "resolved": "https://registry.npmjs.org/ava/-/ava-3.8.1.tgz",
-            "integrity": "sha512-OPWrTxcf1EbtAaGGFQPLbx4AaVqPrFMumKOKn2SzIRo+RTKb33lF2aoVnWqBeZaJ68uSc9R6jqIE7qkG6O33uQ==",
+            "version": "3.8.2",
+            "resolved": "https://registry.npmjs.org/ava/-/ava-3.8.2.tgz",
+            "integrity": "sha512-sph3oUsVTGsq4qbgeWys03QKCmXjkZUO3oPnFWXEW6g1SReCY9vuONGghMgw1G6VOzkg1k+niqJsOzwfO8h9Ng==",
             "dev": true,
             "requires": {
                 "@concordance/react": "^2.0.0",
@@ -369,7 +369,7 @@
                 "indent-string": "^4.0.0",
                 "is-error": "^2.2.2",
                 "is-plain-object": "^3.0.0",
-                "is-promise": "^3.0.0",
+                "is-promise": "^4.0.0",
                 "lodash": "^4.17.15",
                 "matcher": "^3.0.0",
                 "md5-hex": "^3.0.1",
@@ -380,12 +380,12 @@
                 "picomatch": "^2.2.2",
                 "pkg-conf": "^3.1.0",
                 "plur": "^4.0.0",
-                "pretty-ms": "^6.0.1",
+                "pretty-ms": "^7.0.0",
                 "read-pkg": "^5.2.0",
                 "resolve-cwd": "^3.0.0",
                 "slash": "^3.0.0",
                 "source-map-support": "^0.5.19",
-                "stack-utils": "^2.0.1",
+                "stack-utils": "^2.0.2",
                 "strip-ansi": "^6.0.0",
                 "supertap": "^1.0.0",
                 "temp-dir": "^2.0.0",
@@ -408,9 +408,9 @@
             "dev": true
         },
         "blueimp-md5": {
-            "version": "2.14.0",
-            "resolved": "https://registry.npmjs.org/blueimp-md5/-/blueimp-md5-2.14.0.tgz",
-            "integrity": "sha512-fhX8JsIgugJ39g9MUJ4Y0S+WYd/1HATNVzW4nEVknP5uJU1mA7LZCV3OuVH9OvxpuYQXu6ttst0IYIlAyVfBQg==",
+            "version": "2.15.0",
+            "resolved": "https://registry.npmjs.org/blueimp-md5/-/blueimp-md5-2.15.0.tgz",
+            "integrity": "sha512-Zc6sowqlCWu3+V0bocZwdaPPXlRv14EHtYcQDCOghj9EdyKLMkAOODBh3HHAx5r7QRylDYCOaXa/b/edgBLDpA==",
             "dev": true
         },
         "boxen": {
@@ -1283,9 +1283,9 @@
             }
         },
         "is-promise": {
-            "version": "3.0.0",
-            "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-3.0.0.tgz",
-            "integrity": "sha512-aTHJ4BvETyySzLhguH+7sL4b8765eecqq7ZrHVuhZr3FjCL/IV+LsvisEeH+9d0AkChYny3ad1KEL+mKy4ot7A==",
+            "version": "4.0.0",
+            "resolved": "https://registry.npmjs.org/is-promise/-/is-promise-4.0.0.tgz",
+            "integrity": "sha512-hvpoI6korhJMnej285dSg6nu1+e6uxs7zG3BYAm5byqDsgJNWwxzM6z6iZiAgQR4TJ30JmBTOwqZUw3WlyH3AQ==",
             "dev": true
         },
         "is-typedarray": {
@@ -1878,9 +1878,9 @@
             "dev": true
         },
         "pretty-ms": {
-            "version": "6.0.1",
-            "resolved": "https://registry.npmjs.org/pretty-ms/-/pretty-ms-6.0.1.tgz",
-            "integrity": "sha512-ke4njoVmlotekHlHyCZ3wI/c5AMT8peuHs8rKJqekj/oR5G8lND2dVpicFlUz5cbZgE290vvkMuDwfj/OcW1kw==",
+            "version": "7.0.0",
+            "resolved": "https://registry.npmjs.org/pretty-ms/-/pretty-ms-7.0.0.tgz",
+            "integrity": "sha512-J3aPWiC5e9ZeZFuSeBraGxSkGMOvulSWsxDByOcbD1Pr75YL3LSNIKIb52WXbCLE1sS5s4inBBbryjF4Y05Ceg==",
             "dev": true,
             "requires": {
                 "parse-ms": "^2.1.0"
diff --git a/package.json b/package.json
index e3a4060..3092093 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "dependencies": {},
     "devDependencies": {
         "@ava/typescript": "^1.1.0",
-        "ava": "^3.7.0",
+        "ava": "^3.8.2",
         "typescript": "^3.0.0"
     },
     "ava": {