diff --git a/package-lock.json b/package-lock.json
index 54a6411..93562fd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -57,7 +57,7 @@
       "dev": true,
       "requires": {
         "@ava/babel-plugin-throws-helper": "2.0.0",
-        "babel-plugin-espower": "2.3.2"
+        "babel-plugin-espower": "2.4.0"
       }
     },
     "@ava/write-file-atomic": {
@@ -80,6 +80,52 @@
         "arrify": "1.0.1"
       }
     },
+    "@ladjs/time-require": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/@ladjs/time-require/-/time-require-0.1.4.tgz",
+      "integrity": "sha512-weIbJqTMfQ4r1YX85u54DKfjLZs2jwn1XZ6tIOP/pFgMwhIN5BAtaCp/1wn9DzyLsDR9tW0R2NIePcVJ45ivQQ==",
+      "dev": true,
+      "requires": {
+        "chalk": "0.4.0",
+        "date-time": "0.1.1",
+        "pretty-ms": "0.2.2",
+        "text-table": "0.2.0"
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+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-1.0.0.tgz",
+          "integrity": "sha1-yxAt8cVvUSPquLZ817mAJ6AnkXg=",
+          "dev": true
+        },
+        "chalk": {
+          "version": "0.4.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-0.4.0.tgz",
+          "integrity": "sha1-UZmj3c0MHv4jvAjBsCewYXbgxk8=",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "1.0.0",
+            "has-color": "0.1.7",
+            "strip-ansi": "0.1.1"
+          }
+        },
+        "pretty-ms": {
+          "version": "0.2.2",
+          "resolved": "https://registry.npmjs.org/pretty-ms/-/pretty-ms-0.2.2.tgz",
+          "integrity": "sha1-2oeaaC/zOjcBEEbxPWJ/Z8c7hPY=",
+          "dev": true,
+          "requires": {
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+        },
+        "strip-ansi": {
+          "version": "0.1.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-0.1.1.tgz",
+          "integrity": "sha1-OeipjQRNFQZgq+SmgIrPcLt7yZE=",
+          "dev": true
+        }
+      }
+    },
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       "resolved": "https://registry.npmjs.org/@terrajs/mono/-/mono-0.9.1.tgz",
@@ -319,9 +365,9 @@
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-      "integrity": "sha1-W65SvkJIeN2Xg+iRDj/Cki6DyBs=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.0.0.tgz",
+      "integrity": "sha512-O/klc27mWNUigtv0F8NJWbLF00OcegQalkqKURWdosW08YZKi4m6CnSUSvIZG1otNJbTWhN01Hhz389DW7mvDQ==",
       "dev": true
     },
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@@ -491,30 +537,33 @@
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-      "resolved": "https://registry.npmjs.org/auto-bind/-/auto-bind-1.1.0.tgz",
-      "integrity": "sha1-k7hk3H7gGjJigXddXHXKCnUeWWE=",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/auto-bind/-/auto-bind-1.2.0.tgz",
+      "integrity": "sha512-Zw7pZp7tztvKnWWtoII4AmqH5a2PV3ZN5F0BPRTGcc1kpRm4b6QXQnPU7Znbl6BfPfqOVOV29g4JeMqZQaqqOA==",
       "dev": true
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-      "version": "0.22.0",
-      "resolved": "https://registry.npmjs.org/ava/-/ava-0.22.0.tgz",
-      "integrity": "sha512-dYxvVDL9CeIcgaQ/FojaBVaL/rnIsXdgPVliDOMe1O5nSsIZEsPYDIzmZ1KnO/cuxeQx1PQbtW6qziiEwQZusg==",
+      "version": "0.25.0",
+      "resolved": "https://registry.npmjs.org/ava/-/ava-0.25.0.tgz",
+      "integrity": "sha512-4lGNJCf6xL8SvsKVEKxEE46se7JAUIAZoKHw9itTQuwcsydhpAMkBs5gOOiWiwt0JKNIuXWc2/r4r8ZdcNrBEw==",
       "dev": true,
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         "@concordance/react": "1.0.0",
-        "ansi-escapes": "2.0.0",
+        "@ladjs/time-require": "0.1.4",
+        "ansi-escapes": "3.0.0",
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         "arrify": "1.0.1",
-        "auto-bind": "1.1.0",
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+        "babel-plugin-syntax-object-rest-spread": "6.13.0",
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@@ -525,13 +574,13 @@
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         "co-with-promise": "4.6.0",
-        "code-excerpt": "2.1.0",
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         "common-path-prefix": "1.0.0",
         "concordance": "3.0.0",
-        "convert-source-map": "1.5.0",
+        "convert-source-map": "1.5.1",
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-        "debug": "2.6.9",
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@@ -545,12 +594,11 @@
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         "is-obj": "1.0.1",
-        "is-observable": "0.2.0",
+        "is-observable": "1.1.0",
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@@ -558,27 +606,28 @@
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         "make-dir": "1.0.0",
-        "matcher": "1.0.0",
+        "matcher": "1.1.0",
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-        "ms": "2.0.0",
+        "ms": "2.1.1",
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         "option-chain": "1.0.0",
         "package-hash": "2.0.0",
-        "pkg-conf": "2.0.0",
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-        "pretty-ms": "2.1.0",
+        "pretty-ms": "3.1.0",
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         "resolve-cwd": "2.0.0",
         "safe-buffer": "5.1.1",
+        "semver": "5.4.1",
         "slash": "1.0.0",
-        "source-map-support": "0.4.18",
+        "source-map-support": "0.5.3",
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-        "supports-color": "4.5.0",
-        "time-require": "0.1.2",
+        "supertap": "1.0.0",
+        "supports-color": "5.3.0",
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@@ -590,25 +639,27 @@
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-          "resolved": "https://registry.npmjs.org/dot-prop/-/dot-prop-4.2.0.tgz",
-          "integrity": "sha512-tUMXrxlExSW6U2EXiiKGSBVdYgtV8qlHL+C10TsW4PURY/ic+eaysnSkwB4kA/mBlCyy/IKDJ+Lc3wbWeaXtuQ==",
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
           "dev": true,
           "requires": {
-            "is-obj": "1.0.1"
+            "ms": "2.0.0"
+          },
+          "dependencies": {
+            "ms": {
+              "version": "2.0.0",
+              "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+              "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+              "dev": true
+            }
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-        "indent-string": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/indent-string/-/indent-string-3.2.0.tgz",
-          "integrity": "sha1-Sl/W0nzDMvN+VBmlBNu4NxBckok=",
-          "dev": true
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-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==",
           "dev": true
         },
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@@ -619,6 +670,23 @@
           "requires": {
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           }
+        },
+        "supports-color": {
+          "version": "5.3.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.3.0.tgz",
+          "integrity": "sha512-0aP01LLIskjKs3lq52EC0aGBAJhLq7B2Rd8HC/DR/PtNNpcLilNmHC12O+hu0usQpo7wtHNRqtrhBwtDb0+dNg==",
+          "dev": true,
+          "requires": {
+            "has-flag": "3.0.0"
+          },
+          "dependencies": {
+            "has-flag": {
+              "version": "3.0.0",
+              "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+              "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+              "dev": true
+            }
+          }
         }
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@@ -633,86 +701,6 @@
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-          "integrity": "sha1-lEvs00zEHuMqY6n68nrVpl/Fl3c=",
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-          "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
-          "dev": true,
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-          "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
-          "dev": true,
-          "requires": {
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-            "parse-json": "2.2.0",
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-          "dev": true,
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-          "dev": true
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@@ -772,7 +760,7 @@
       "dev": true,
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-        "babel-generator": "6.26.0",
+        "babel-generator": "6.26.1",
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@@ -781,7 +769,7 @@
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         "babel-types": "6.26.0",
         "babylon": "6.18.0",
-        "convert-source-map": "1.5.0",
+        "convert-source-map": "1.5.1",
         "debug": "2.6.9",
         "json5": "0.5.1",
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@@ -790,20 +778,12 @@
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-          "dev": true
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-      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.0.tgz",
-      "integrity": "sha1-rBriAHC3n248odMmlhMFN3TyDcU=",
+      "version": "6.26.1",
+      "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.1.tgz",
+      "integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
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@@ -821,12 +801,6 @@
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@@ -950,15 +924,15 @@
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-      "integrity": "sha1-VRa4/NsmyfDh2BYHSfbkxl5xJx4=",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/babel-plugin-espower/-/babel-plugin-espower-2.4.0.tgz",
+      "integrity": "sha512-/+SRpy7pKgTI28oEHfn1wkuM5QFAdRq8WNsOOih1dVrdV6A/WbNbRZyl0eX5eyDgtb0lOE27PeDFuCX2j8OxVg==",
       "dev": true,
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-        "babel-generator": "6.26.0",
+        "babel-generator": "6.26.1",
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@@ -976,6 +950,12 @@
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       "dev": true
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+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
+      "integrity": "sha1-/WU28rzhODb/o6VFjEkDpZe7O/U=",
+      "dev": true
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@@ -1099,11 +1079,22 @@
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+          "dev": true,
+          "requires": {
+            "source-map": "0.5.7"
+          }
+        }
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@@ -1112,8 +1103,8 @@
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       "dev": true,
       "requires": {
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-        "regenerator-runtime": "0.11.0"
+        "core-js": "2.5.3",
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@@ -1142,7 +1133,7 @@
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@@ -1472,7 +1463,7 @@
       "integrity": "sha1-UTTQd5hPcSpU2tPL9i3ijc5BbKg=",
       "dev": true,
       "requires": {
-        "core-js": "2.5.1",
+        "core-js": "2.5.3",
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@@ -1577,9 +1568,9 @@
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-      "integrity": "sha1-+eEss3D8JgXhFARYK6VO9corLZg=",
-      "dev": true,
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-        "date-time": "0.1.1",
-        "pretty-ms": "0.2.2",
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-          "integrity": "sha1-yxAt8cVvUSPquLZ817mAJ6AnkXg=",
-          "dev": true
-        },
-        "chalk": {
-          "version": "0.4.0",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-0.4.0.tgz",
-          "integrity": "sha1-UZmj3c0MHv4jvAjBsCewYXbgxk8=",
-          "dev": true,
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-            "ansi-styles": "1.0.0",
-            "has-color": "0.1.7",
-            "strip-ansi": "0.1.1"
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-        "date-time": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/date-time/-/date-time-0.1.1.tgz",
-          "integrity": "sha1-7S9tk9l5DOL9ZtW1/z7dW7y/Owc=",
-          "dev": true
-        },
-        "parse-ms": {
-          "version": "0.1.2",
-          "resolved": "https://registry.npmjs.org/parse-ms/-/parse-ms-0.1.2.tgz",
-          "integrity": "sha1-3T+iXtbC78e93hKtm0bBY6opIk4=",
-          "dev": true
-        },
-        "pretty-ms": {
-          "version": "0.2.2",
-          "resolved": "https://registry.npmjs.org/pretty-ms/-/pretty-ms-0.2.2.tgz",
-          "integrity": "sha1-2oeaaC/zOjcBEEbxPWJ/Z8c7hPY=",
-          "dev": true,
-          "requires": {
-            "parse-ms": "0.1.2"
-          }
-        },
-        "strip-ansi": {
-          "version": "0.1.1",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-0.1.1.tgz",
-          "integrity": "sha1-OeipjQRNFQZgq+SmgIrPcLt7yZE=",
-          "dev": true
-        }
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     "time-zone": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/time-zone/-/time-zone-1.0.0.tgz",
@@ -10291,13 +10330,13 @@
       "optional": true
     },
     "validate-npm-package-license": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz",
-      "integrity": "sha1-KAS6vnEq0zeUWaz74kdGqywwP7w=",
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.3.tgz",
+      "integrity": "sha512-63ZOUnL4SIXj4L0NixR3L1lcjO38crAbgrTpl28t8jjrfuiOBL5Iygm+60qPs/KsZGzPNg6Smnc/oY16QTjF0g==",
       "dev": true,
       "requires": {
-        "spdx-correct": "1.0.2",
-        "spdx-expression-parse": "1.0.4"
+        "spdx-correct": "3.0.0",
+        "spdx-expression-parse": "3.0.0"
       }
     },
     "vary": {
@@ -10408,6 +10447,12 @@
           "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-5.0.0.tgz",
           "integrity": "sha1-OHHMCmoALow+Wzz38zYmRnXwa50=",
           "dev": true
+        },
+        "pify": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
+          "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
+          "dev": true
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       }
     },
diff --git a/package.json b/package.json
index b93da01..78a7e31 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "license": "MIT",
   "devDependencies": {
     "@terrajs/mono": "0.9.1",
-    "ava": "0.22.0",
+    "ava": "0.25.0",
     "codecov": "2.3.1",
     "eslint": "4.9.0",
     "mongodb-utils": "1.1.4",