diff --git a/bin/build-sass.js b/bin/build-sass.js
index 52c51aa..5c80424 100755
--- a/bin/build-sass.js
+++ b/bin/build-sass.js
@@ -2,7 +2,6 @@
 
 const sass = require('node-sass')
 const chokidar = require('chokidar')
-const argv = require('yargs').argv
 const path = require('path')
 const debounce = require('lodash/debounce')
 const fs = require('fs')
@@ -62,7 +61,7 @@ async function compileThemesSass () {
 
 async function main () {
   await Promise.all([compileGlobalSass(), compileThemesSass()])
-  if (argv.watch) {
+  if (process.argv.includes('--watch')) {
     doWatch()
   }
 }
diff --git a/bin/globalize-css.js b/bin/globalize-css.js
index 07bf9f8..a2d1352 100755
--- a/bin/globalize-css.js
+++ b/bin/globalize-css.js
@@ -2,7 +2,6 @@
 // Change all the Svelte CSS to just use globals everywhere,
 // to reduce CSS size and complexity.
 
-const argv = require('yargs').argv
 const path = require('path')
 const fs = require('fs')
 const pify = require('pify')
@@ -15,7 +14,7 @@ const selectorRegex = /\n[ \t\n]*([0-9\w\- \t\n.:#,]+?)[ \t\n]*{/g
 const styleRegex = /<style>[\s\S]+?<\/style>/
 
 async function main () {
-  if (argv.reverse) { // reverse the operation we just did
+  if (process.argv.includes('--reverse')) { // reverse the operation we just did
     let tmpComponents = await glob('./routes/**/.tmp-*.html')
     for (let filename of tmpComponents) {
       let text = await readFile(filename, 'utf8')
diff --git a/package-lock.json b/package-lock.json
index 606dbe2..18a9e5e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1985,11 +1985,6 @@
       "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
       "dev": true
     },
-    "camelcase": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-      "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
-    },
     "camelcase-keys": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-2.1.0.tgz",
@@ -2755,31 +2750,6 @@
       "integrity": "sha1-/xnt6Kml5XkyQUewwR8PvLq+1jk=",
       "dev": true
     },
-    "cliui": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.1.0.tgz",
-      "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
-      "requires": {
-        "string-width": "^2.1.1",
-        "strip-ansi": "^4.0.0",
-        "wrap-ansi": "^2.0.0"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
-        },
-        "strip-ansi": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
-          "requires": {
-            "ansi-regex": "^3.0.0"
-          }
-        }
-      }
-    },
     "co": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
@@ -3051,6 +3021,7 @@
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
       "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
+      "dev": true,
       "requires": {
         "nice-try": "^1.0.4",
         "path-key": "^2.0.1",
@@ -3062,7 +3033,8 @@
         "semver": {
           "version": "5.5.1",
           "resolved": "https://registry.npmjs.org/semver/-/semver-5.5.1.tgz",
-          "integrity": "sha512-PqpAxfrEhlSUWge8dwIp4tZnQ25DIOthpiaHNIthsjEFQD6EvqUKUDM7L8O2rShkFccYo1VjJR0coWfNkCubRw=="
+          "integrity": "sha512-PqpAxfrEhlSUWge8dwIp4tZnQ25DIOthpiaHNIthsjEFQD6EvqUKUDM7L8O2rShkFccYo1VjJR0coWfNkCubRw==",
+          "dev": true
         }
       }
     },
@@ -4281,9 +4253,9 @@
       },
       "dependencies": {
         "ajv": {
-          "version": "6.5.3",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.3.tgz",
-          "integrity": "sha512-LqZ9wY+fx3UMiiPd741yB2pj3hhil+hQc8taf4o2QGRFpWgZ2V5C8HA165DY9sS3fJwsk7uT7ZlFEyC3Ig3lLg==",
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.4.tgz",
+          "integrity": "sha512-4Wyjt8+t6YszqaXnLDfMmG/8AlO5Zbcsy3ATHncCzjW/NoPzAId8AK6749Ybjmdt+kUY1gP60fCu46oDxPv/mg==",
           "dev": true,
           "requires": {
             "fast-deep-equal": "^2.0.1",
@@ -4731,20 +4703,6 @@
         "safe-buffer": "^5.1.1"
       }
     },
-    "execa": {
-      "version": "0.10.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-0.10.0.tgz",
-      "integrity": "sha512-7XOMnz8Ynx1gGo/3hyV9loYNPWM94jG3+3T3Y8tsfSstFmETmENCMU/A/zj8Lyaj1lkgEepKepvd6240tBRvlw==",
-      "requires": {
-        "cross-spawn": "^6.0.0",
-        "get-stream": "^3.0.0",
-        "is-stream": "^1.1.0",
-        "npm-run-path": "^2.0.0",
-        "p-finally": "^1.0.0",
-        "signal-exit": "^3.0.0",
-        "strip-eof": "^1.0.0"
-      }
-    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -5392,11 +5350,6 @@
       "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-4.0.1.tgz",
       "integrity": "sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4="
     },
-    "get-stream": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
-      "integrity": "sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ="
-    },
     "get-value": {
       "version": "2.0.6",
       "resolved": "https://registry.npmjs.org/get-value/-/get-value-2.0.6.tgz",
@@ -6278,11 +6231,6 @@
       "resolved": "https://registry.npmjs.org/is-resolvable/-/is-resolvable-1.1.0.tgz",
       "integrity": "sha512-qgDYXFSR5WvEfuS5dMj6oTMEbrrSaM0CrFk2Yiq/gXnBvD9pMa2jGXxyhGLfvhZpuMZe18CJpFxAt3CRs42NMg=="
     },
-    "is-stream": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
-      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ="
-    },
     "is-symbol": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz",
@@ -6706,14 +6654,6 @@
       "resolved": "https://registry.npmjs.org/mamacro/-/mamacro-0.0.3.tgz",
       "integrity": "sha512-qMEwh+UujcQ+kbz3T6V+wAmO2U8veoq2w+3wY8MquqwVA3jChfwY+Tk52GZKDfACEPjuZ7r2oJLejwpt8jtwTA=="
     },
-    "map-age-cleaner": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/map-age-cleaner/-/map-age-cleaner-0.1.2.tgz",
-      "integrity": "sha512-UN1dNocxQq44IhJyMI4TU8phc2m9BddacHRPRjKGLYaF0jqd3xLz0jS0skpAU9WgYyoR4gHtUpzytNBS385FWQ==",
-      "requires": {
-        "p-defer": "^1.0.0"
-      }
-    },
     "map-cache": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/map-cache/-/map-cache-0.2.2.tgz",
@@ -6771,16 +6711,6 @@
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
       "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
     },
-    "mem": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/mem/-/mem-4.0.0.tgz",
-      "integrity": "sha512-WQxG/5xYc3tMbYLXoXPm81ET2WDULiU5FxbuIoNbJqLOOI8zehXFdZuiUEgfdrU2mVB1pxBZUGlYORSrpuJreA==",
-      "requires": {
-        "map-age-cleaner": "^0.1.1",
-        "mimic-fn": "^1.0.0",
-        "p-is-promise": "^1.1.0"
-      }
-    },
     "memory-fs": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.4.1.tgz",
@@ -6895,7 +6825,8 @@
     "mimic-fn": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.1.0.tgz",
-      "integrity": "sha1-5md4PZLonb00KBi1IwudYqZyrRg="
+      "integrity": "sha1-5md4PZLonb00KBi1IwudYqZyrRg=",
+      "dev": true
     },
     "mimic-response": {
       "version": "1.0.1",
@@ -7377,14 +7308,6 @@
         }
       }
     },
-    "npm-run-path": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-2.0.2.tgz",
-      "integrity": "sha1-NakjLfo11wZ7TLLd8jV7GHFTbF8=",
-      "requires": {
-        "path-key": "^2.0.0"
-      }
-    },
     "npmlog": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-4.1.2.tgz",
@@ -7630,31 +7553,6 @@
       "resolved": "https://registry.npmjs.org/os-homedir/-/os-homedir-1.0.2.tgz",
       "integrity": "sha1-/7xJiDNuDoM94MFox+8VISGqf7M="
     },
-    "os-locale": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-3.0.1.tgz",
-      "integrity": "sha512-7g5e7dmXPtzcP4bgsZ8ixDVqA7oWYuEz4lOSujeWyliPai4gfVDiFIcwBg3aGCPnmSGfzOKTK3ccPn0CKv3DBw==",
-      "requires": {
-        "execa": "^0.10.0",
-        "lcid": "^2.0.0",
-        "mem": "^4.0.0"
-      },
-      "dependencies": {
-        "invert-kv": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-2.0.0.tgz",
-          "integrity": "sha512-wPVv/y/QQ/Uiirj/vh3oP+1Ww+AWehmi1g5fFWGPF6IpCBCDVrhgHRMvrLfdYcwDh3QJbGXDW4JAuzxElLSqKA=="
-        },
-        "lcid": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/lcid/-/lcid-2.0.0.tgz",
-          "integrity": "sha512-avPEb8P8EGnwXKClwsNUgryVjllcRqtMYa49NTsbQagYuT1DcXnl1915oxWjoyGrXR6zH/Y0Zc96xWsPcoDKeA==",
-          "requires": {
-            "invert-kv": "^2.0.0"
-          }
-        }
-      }
-    },
     "os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
@@ -7677,21 +7575,6 @@
         "p-some": "^2.0.0"
       }
     },
-    "p-defer": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/p-defer/-/p-defer-1.0.0.tgz",
-      "integrity": "sha1-n26xgvbJqozXQwBKfU+WsZaw+ww="
-    },
-    "p-finally": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
-      "integrity": "sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4="
-    },
-    "p-is-promise": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/p-is-promise/-/p-is-promise-1.1.0.tgz",
-      "integrity": "sha1-nJRWmJ6fZYgBewQ01WCXZ1w9oF4="
-    },
     "p-limit": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.2.0.tgz",
@@ -10212,11 +10095,6 @@
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
       "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM="
     },
-    "strip-eof": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
-      "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8="
-    },
     "strip-indent": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/strip-indent/-/strip-indent-1.0.1.tgz",
@@ -11945,11 +11823,6 @@
         "isexe": "^2.0.0"
       }
     },
-    "which-module": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
-    },
     "which-pm-runs": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/which-pm-runs/-/which-pm-runs-1.0.0.tgz",
@@ -12080,11 +11953,6 @@
       "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.4.tgz",
       "integrity": "sha1-UZy0ymhtAFqEINNJbz8MruzKWA8="
     },
-    "xregexp": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-4.0.0.tgz",
-      "integrity": "sha512-PHyM+sQouu7xspQQwELlGwwd05mXUFqwFYfqPO0cC7x4fxyHnnuetmQr6CjJiafIDoH4MogHb9dOoJzR/Y4rFg=="
-    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
@@ -12105,81 +11973,6 @@
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
-    },
-    "yargs": {
-      "version": "12.0.2",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.2.tgz",
-      "integrity": "sha512-e7SkEx6N6SIZ5c5H22RTZae61qtn3PYUE8JYbBFlK9sYmh3DMQ6E5ygtaG/2BW0JZi4WGgTR2IV5ChqlqrDGVQ==",
-      "requires": {
-        "cliui": "^4.0.0",
-        "decamelize": "^2.0.0",
-        "find-up": "^3.0.0",
-        "get-caller-file": "^1.0.1",
-        "os-locale": "^3.0.0",
-        "require-directory": "^2.1.1",
-        "require-main-filename": "^1.0.1",
-        "set-blocking": "^2.0.0",
-        "string-width": "^2.0.0",
-        "which-module": "^2.0.0",
-        "y18n": "^3.2.1 || ^4.0.0",
-        "yargs-parser": "^10.1.0"
-      },
-      "dependencies": {
-        "decamelize": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-2.0.0.tgz",
-          "integrity": "sha512-Ikpp5scV3MSYxY39ymh45ZLEecsTdv/Xj2CaQfI8RLMuwi7XvjX9H/fhraiSuU+C5w5NTDu4ZU72xNiZnurBPg==",
-          "requires": {
-            "xregexp": "4.0.0"
-          }
-        },
-        "find-up": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
-          "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
-          "requires": {
-            "locate-path": "^3.0.0"
-          }
-        },
-        "locate-path": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
-          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
-          "requires": {
-            "p-locate": "^3.0.0",
-            "path-exists": "^3.0.0"
-          }
-        },
-        "p-limit": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.0.0.tgz",
-          "integrity": "sha512-fl5s52lI5ahKCernzzIyAP0QAZbGIovtVHGwpcu1Jr/EpzLVDI2myISHwGqK7m8uQFugVWSrbxH7XnhGtvEc+A==",
-          "requires": {
-            "p-try": "^2.0.0"
-          }
-        },
-        "p-locate": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
-          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
-          "requires": {
-            "p-limit": "^2.0.0"
-          }
-        },
-        "p-try": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.0.0.tgz",
-          "integrity": "sha512-hMp0onDKIajHfIkdRk3P4CdCmErkYAxxDtP3Wx/4nZ3aGlau2VKh3mZpcuFkH27WQkL/3WBCPOktzA9ZOAnMQQ=="
-        }
-      }
-    },
-    "yargs-parser": {
-      "version": "10.1.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
-      "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
-      "requires": {
-        "camelcase": "^4.1.0"
-      }
     }
   }
 }
diff --git a/package.json b/package.json
index 9934327..60cb606 100644
--- a/package.json
+++ b/package.json
@@ -99,8 +99,7 @@
     "web-animations-js": "^2.3.1",
     "webpack": "^4.19.1",
     "webpack-bundle-analyzer": "^3.0.2",
-    "workerize-loader": "^1.0.4",
-    "yargs": "^12.0.2"
+    "workerize-loader": "^1.0.4"
   },
   "devDependencies": {
     "eslint-plugin-html": "^4.0.6",