diff --git a/package-lock.json b/package-lock.json
index 5b955dc..b6b895e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sapper",
-  "version": "0.23.1",
+  "version": "0.24.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1702,12 +1702,6 @@
       "integrity": "sha512-jnjyiM6eRyZl2H+W8Q/zLMA481hzi0eszAaBUzIVnmYVDBbnLxVNnfu1HgEBvCbL+71FrxMl3E6lpKH7Ge3OXA==",
       "dev": true
     },
-    "duplexer": {
-      "version": "0.1.1",
-      "resolved": "http://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
-      "integrity": "sha1-rOb/gIwc5mtX0ev5eXessCM0z8E=",
-      "dev": true
-    },
     "duplexify": {
       "version": "3.6.1",
       "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.6.1.tgz",
@@ -2043,22 +2037,6 @@
       "integrity": "sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=",
       "dev": true
     },
-    "event-stream": {
-      "version": "3.3.6",
-      "resolved": "https://registry.npmjs.org/event-stream/-/event-stream-3.3.6.tgz",
-      "integrity": "sha512-dGXNg4F/FgVzlApjzItL+7naHutA3fDqbV/zAZqDDlXTjiMnQmZKu+prImWKszeBM5UQeGvAl3u1wBiKeDh61g==",
-      "dev": true,
-      "requires": {
-        "duplexer": "^0.1.1",
-        "flatmap-stream": "^0.1.0",
-        "from": "^0.1.7",
-        "map-stream": "0.0.7",
-        "pause-stream": "^0.0.11",
-        "split": "^1.0.1",
-        "stream-combiner": "^0.2.2",
-        "through": "^2.3.8"
-      }
-    },
     "events": {
       "version": "1.1.1",
       "resolved": "http://registry.npmjs.org/events/-/events-1.1.1.tgz",
@@ -2281,12 +2259,6 @@
         "write": "^0.2.1"
       }
     },
-    "flatmap-stream": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/flatmap-stream/-/flatmap-stream-0.1.1.tgz",
-      "integrity": "sha512-lAq4tLbm3sidmdCN8G3ExaxH7cUCtP5mgDvrYowsx84dcYkJJ4I28N7gkxA6+YlSXzaGLJYIDEi9WGfXzMiXdw==",
-      "dev": true
-    },
     "flush-write-stream": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/flush-write-stream/-/flush-write-stream-1.0.3.tgz",
@@ -2321,12 +2293,6 @@
         "map-cache": "^0.2.2"
       }
     },
-    "from": {
-      "version": "0.1.7",
-      "resolved": "https://registry.npmjs.org/from/-/from-0.1.7.tgz",
-      "integrity": "sha1-g8YK/Fi5xWmXAH7Rp2izqzA6RP4=",
-      "dev": true
-    },
     "from2": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/from2/-/from2-2.3.0.tgz",
@@ -2396,12 +2362,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -2416,17 +2384,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -2543,7 +2514,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -2555,6 +2527,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -2569,6 +2542,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -2576,12 +2550,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -2600,6 +2576,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -2680,7 +2657,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -2692,6 +2670,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2813,6 +2792,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -3648,12 +3628,6 @@
       "integrity": "sha1-wyq9C9ZSXZsFFkW7TyasXcmKDb8=",
       "dev": true
     },
-    "map-stream": {
-      "version": "0.0.7",
-      "resolved": "https://registry.npmjs.org/map-stream/-/map-stream-0.0.7.tgz",
-      "integrity": "sha1-ih8HiW2CsQkmvTdEokIACfiJdKg=",
-      "dev": true
-    },
     "map-visit": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/map-visit/-/map-visit-1.0.0.tgz",
@@ -4059,17 +4033,17 @@
       }
     },
     "npm-run-all": {
-      "version": "4.1.3",
-      "resolved": "https://registry.npmjs.org/npm-run-all/-/npm-run-all-4.1.3.tgz",
-      "integrity": "sha512-aOG0N3Eo/WW+q6sUIdzcV2COS8VnTZCmdji0VQIAZF3b+a3YWb0AD0vFIyjKec18A7beLGbaQ5jFTNI2bPt9Cg==",
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/npm-run-all/-/npm-run-all-4.1.5.tgz",
+      "integrity": "sha512-Oo82gJDAVcaMdi3nuoKFavkIHBRVqQ1qvMb+9LHk/cF4P6B2m8aP04hGf7oL6wZ9BuGwX1onlLhpuoofSyoQDQ==",
       "dev": true,
       "requires": {
-        "ansi-styles": "^3.2.0",
-        "chalk": "^2.1.0",
-        "cross-spawn": "^6.0.4",
+        "ansi-styles": "^3.2.1",
+        "chalk": "^2.4.1",
+        "cross-spawn": "^6.0.5",
         "memorystream": "^0.3.1",
         "minimatch": "^3.0.4",
-        "ps-tree": "^1.1.0",
+        "pidtree": "^0.3.0",
         "read-pkg": "^3.0.0",
         "shell-quote": "^1.6.1",
         "string.prototype.padend": "^3.0.0"
@@ -4399,15 +4373,6 @@
         "pify": "^2.0.0"
       }
     },
-    "pause-stream": {
-      "version": "0.0.11",
-      "resolved": "http://registry.npmjs.org/pause-stream/-/pause-stream-0.0.11.tgz",
-      "integrity": "sha1-/lo0sMvOErWqaitAPuLnO2AvFEU=",
-      "dev": true,
-      "requires": {
-        "through": "~2.3"
-      }
-    },
     "pbkdf2": {
       "version": "3.0.17",
       "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.17.tgz",
@@ -4427,6 +4392,12 @@
       "integrity": "sha1-elfrVQpng/kRUzH89GY9XI4AelA=",
       "dev": true
     },
+    "pidtree": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/pidtree/-/pidtree-0.3.0.tgz",
+      "integrity": "sha512-9CT4NFlDcosssyg8KVFltgokyKZIFjoBxw8CTGy+5F38Y1eQWrt8tRayiUOXE+zVKQnYu5BR8JjCtvK3BcnBhg==",
+      "dev": true
+    },
     "pify": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
@@ -4539,15 +4510,6 @@
       "integrity": "sha1-0/wRS6BplaRexok/SEzrHXj19HY=",
       "dev": true
     },
-    "ps-tree": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/ps-tree/-/ps-tree-1.1.0.tgz",
-      "integrity": "sha1-tCGyQUDWID8e08dplrRCewjowBQ=",
-      "dev": true,
-      "requires": {
-        "event-stream": "~3.3.0"
-      }
-    },
     "pseudomap": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
@@ -5665,15 +5627,6 @@
       "integrity": "sha512-TfOfPcYGBB5sDuPn3deByxPhmfegAhpDYKSOXZQN81Oyrrif8ZCodOLzK3AesELnCx03kikhyDwh0pfvvQvF8w==",
       "dev": true
     },
-    "split": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/split/-/split-1.0.1.tgz",
-      "integrity": "sha512-mTyOoPbrivtXnwnIxZRFYRrPNtEFKlpB2fvjSnCQUiAA6qAZzqwna5envK4uk6OIeP17CsdF3rSBGYVBsU0Tkg==",
-      "dev": true,
-      "requires": {
-        "through": "2"
-      }
-    },
     "split-string": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/split-string/-/split-string-3.1.0.tgz",
@@ -5729,16 +5682,6 @@
         "readable-stream": "^2.0.2"
       }
     },
-    "stream-combiner": {
-      "version": "0.2.2",
-      "resolved": "http://registry.npmjs.org/stream-combiner/-/stream-combiner-0.2.2.tgz",
-      "integrity": "sha1-rsjLrBd7Vrb0+kec7YwZEs7lKFg=",
-      "dev": true,
-      "requires": {
-        "duplexer": "~0.1.1",
-        "through": "~2.3.4"
-      }
-    },
     "stream-each": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/stream-each/-/stream-each-1.2.3.tgz",
diff --git a/package.json b/package.json
index deeb2af..31a9f1c 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "mkdirp": "^0.5.1",
     "mocha": "^5.2.0",
     "node-fetch": "^2.2.0",
-    "npm-run-all": "^4.1.3",
+    "npm-run-all": "^4.1.5",
     "polka": "^0.5.1",
     "port-authority": "^1.0.5",
     "pretty-bytes": "^5.1.0",