diff --git a/package.json b/package.json
index 3fdcda89..34b6a38c 100644
--- a/package.json
+++ b/package.json
@@ -8,12 +8,9 @@
     "command-line-args": "^5.1.1",
     "csp-serdes": "github:cmcaine/csp-serdes",
     "css": "^2.2.4",
-    "flyd": "^0.2.8",
     "fuse.js": "^6.2.0",
-    "immer": "^6.0.9",
     "jasmine-fail-fast": "^2.0.1",
     "mark.js": "^8.11.1",
-    "mithril": "^2.0.4",
     "ramda": "^0.27.0",
     "rss-parser": "^3.8.0",
     "semver-compare": "^1.0.0",
@@ -21,7 +18,6 @@
   },
   "devDependencies": {
     "@types/jest": "^25.2.3",
-    "@types/mithril": "^2.0.3",
     "@types/node": "^14.0.13",
     "@types/selenium-webdriver": "^4.0.9",
     "cleanslate": "^0.10.1",
diff --git a/yarn.lock b/yarn.lock
index d1666984..3221551c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -721,11 +721,6 @@
   resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
   integrity sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==
 
-"@types/mithril@^2.0.3":
-  version "2.0.3"
-  resolved "https://registry.yarnpkg.com/@types/mithril/-/mithril-2.0.3.tgz#f24a764515d9b17095845838b12f2444757d93fa"
-  integrity sha512-cZHOdO2IiXYeyjeDYdbOisSdfaJRzfmRo3zVzgu33IWTMA0KEQObp9fdvqcuYdPz93iJ1yCl19GcEjo/9yv+yA==
-
 "@types/nearley@^2.11.1":
   version "2.11.1"
   resolved "https://registry.yarnpkg.com/@types/nearley/-/nearley-2.11.1.tgz#6ac3f57c00ca28071a1774ec72d2e45750f21420"
@@ -3576,13 +3571,6 @@ flush-write-stream@^1.0.0:
     inherits "^2.0.3"
     readable-stream "^2.3.6"
 
-flyd@^0.2.8:
-  version "0.2.8"
-  resolved "https://registry.yarnpkg.com/flyd/-/flyd-0.2.8.tgz#26b606a051431ec275dd7ca2cb5fb61756fcd7f1"
-  integrity sha512-PVr++d+cOkf//kVIm66aTgmmrHNAhqNH9TIZQzunrVL9GaW7pMFTuLcaGkTV9z4bkvVWPB1VGuxjGFFfQUZNwA==
-  dependencies:
-    ramda "^0.25.0"
-
 for-in@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -4209,11 +4197,6 @@ immediate@~3.0.5:
   resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.0.6.tgz#9db1dbd0faf8de6fbe0f5dd5e56bb606280de69b"
   integrity sha1-nbHb0Pr43m++D13V5Wu2BigN5ps=
 
-immer@^6.0.9:
-  version "6.0.9"
-  resolved "https://registry.yarnpkg.com/immer/-/immer-6.0.9.tgz#b9dd69b8e69b3a12391e87db1e3ff535d1b26485"
-  integrity sha512-SyCYnAuiRf67Lvk0VkwFvwtDoEiCMjeamnHvRfnVDyc7re1/rQrNxuL+jJ7lA3WvdC4uznrvbmm+clJ9+XXatg==
-
 immutable@^3.8.2:
   version "3.8.2"
   resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
@@ -5813,11 +5796,6 @@ mississippi@^3.0.0:
     stream-each "^1.1.0"
     through2 "^2.0.0"
 
-mithril@^2.0.4:
-  version "2.0.4"
-  resolved "https://registry.yarnpkg.com/mithril/-/mithril-2.0.4.tgz#d125969d992b924c7185d24ff92d997e5c00116b"
-  integrity sha512-mgw+DMZlhMS4PpprF6dl7ZoeZq5GGcAuWnrg5e12MvaGauc4jzWsDZtVGRCktsiQczOEUr2K5teKbE5k44RlOg==
-
 mixin-deep@^1.2.0:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.2.tgz#1120b43dc359a785dce65b55b82e257ccf479566"
@@ -6771,11 +6749,6 @@ railroad-diagrams@^1.0.0:
   resolved "https://registry.yarnpkg.com/railroad-diagrams/-/railroad-diagrams-1.0.0.tgz#eb7e6267548ddedfb899c1b90e57374559cddb7e"
   integrity sha1-635iZ1SN3t+4mcG5Dlc3RVnN234=
 
-ramda@^0.25.0:
-  version "0.25.0"
-  resolved "https://registry.yarnpkg.com/ramda/-/ramda-0.25.0.tgz#8fdf68231cffa90bc2f9460390a0cb74a29b29a9"
-  integrity sha512-GXpfrYVPwx3K7RQ6aYT8KPS8XViSXUVJT1ONhoKPE9VAleW42YE+U+8VEyGWt41EnEQW7gwecYJriTI0pKoecQ==
-
 ramda@^0.27.0:
   version "0.27.0"
   resolved "https://registry.yarnpkg.com/ramda/-/ramda-0.27.0.tgz#915dc29865c0800bf3f69b8fd6c279898b59de43"