diff --git a/package-lock.json b/package-lock.json
index b72b2c2..f957391 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -245,6 +239,31 @@
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@@ -262,6 +281,12 @@
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@@ -667,6 +712,15 @@
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-              "integrity": "sha1-XM50B7r2Qsunvs2laBEcST9ZZlo=",
-              "dev": true
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+            "readable-stream": "3"
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-        "umd": {
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-          "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.1.tgz",
-          "integrity": "sha1-iuVW4RAR9jwllnCKiDclnwGz1g4=",
+        "xtend": {
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+          "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+          "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
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       }
@@ -6329,6 +6308,30 @@
       "integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs=",
       "dev": true
     },
+    "which-typed-array": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.11.tgz",
+      "integrity": "sha512-qe9UWWpkeG5yzZ0tNYxDmd7vo58HDBc39mZ0xWWpolAGADdFOzkfamWLDxkOWcvHQKVmdTyQdLD4NOfjLWTKew==",
+      "dev": true,
+      "requires": {
+        "available-typed-arrays": "^1.0.5",
+        "call-bind": "^1.0.2",
+        "for-each": "^0.3.3",
+        "gopd": "^1.0.1",
+        "has-tostringtag": "^1.0.0"
+      },
+      "dependencies": {
+        "for-each": {
+          "version": "0.3.3",
+          "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",
+          "integrity": "sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==",
+          "dev": true,
+          "requires": {
+            "is-callable": "^1.1.3"
+          }
+        }
+      }
+    },
     "wide-align": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
@@ -6450,26 +6453,6 @@
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       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
       "dev": true
-    },
-    "yargs": {
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-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.5.4.tgz",
-      "integrity": "sha1-2K/49mXpTDS9JZvevRv68N3TU2E=",
-      "dev": true,
-      "requires": {
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-        "decamelize": "1.2.0",
-        "window-size": "0.1.0",
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-          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
-          "dev": true
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-      }
     }
   }
 }
diff --git a/package.json b/package.json
index e6c850c..8e18096 100644
--- a/package.json
+++ b/package.json
@@ -17,14 +17,14 @@
     "uglify-js": "^3.3.23"
   },
   "devDependencies": {
-    "browserify": "^6.3.2",
+    "browserify": "^17.0.0",
     "eslint": "^4.19.0",
     "eslint-config-mourner": "^2.0.3",
     "mapbox-gl": "^0.44.0",
     "mapbox-gl-js-mock": "^1.0.2",
     "serve": "^1.4.0",
     "tape": "2.13.x",
-    "watchify": "^2.3.0"
+    "watchify": "^4.0.0"
   },
   "scripts": {
     "start": "watchify --standalone instrumentile-gl -d ./index.js -o ./bundle.js & serve",