diff --git a/package.json b/package.json
index 0b7150d2b..faec6870e 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,7 @@
     "babel-plugin-styled-components": "^1.11.1",
     "babel-plugin-transform-class-properties": "^6.24.1",
     "body-scroll-lock": "^4.0.0-beta.0",
-    "bull": "^4.8.5",
+    "bull": "^4.10.2",
     "cancan": "3.1.0",
     "chalk": "^4.1.0",
     "class-validator": "^0.13.2",
@@ -108,7 +108,7 @@
     "immutable": "^4.0.0",
     "inline-css": "^4.0.1",
     "invariant": "^2.2.4",
-    "ioredis": "^4.28.5",
+    "ioredis": "^5.0.0",
     "is-printable-key-event": "^1.0.0",
     "jsdom": "^20.0.3",
     "json-loader": "0.5.7",
@@ -234,7 +234,6 @@
     "@pmmmwh/react-refresh-webpack-plugin": "^0.5.10",
     "@relative-ci/agent": "^3.0.0",
     "@types/body-scroll-lock": "^3.1.0",
-    "@types/bull": "^3.15.9",
     "@types/crypto-js": "^4.1.1",
     "@types/datadog-metrics": "^0.6.2",
     "@types/emoji-regex": "^9.2.0",
@@ -247,7 +246,6 @@
     "@types/google.analytics": "^0.0.42",
     "@types/inline-css": "^3.0.1",
     "@types/invariant": "^2.2.35",
-    "@types/ioredis": "^4.28.1",
     "@types/jest": "^28.1.6",
     "@types/jsonwebtoken": "^8.5.8",
     "@types/katex": "^0.14.0",
diff --git a/server/redis.ts b/server/redis.ts
index 665d64ae4..ef8027a3e 100644
--- a/server/redis.ts
+++ b/server/redis.ts
@@ -1,14 +1,14 @@
-import Redis from "ioredis";
+import Redis, { RedisOptions } from "ioredis";
 import { defaults } from "lodash";
 import env from "@server/env";
 import Logger from "@server/logging/Logger";
 
-type RedisAdapterOptions = Redis.RedisOptions & {
+type RedisAdapterOptions = RedisOptions & {
   /** Suffix to append to the connection name that will be displayed in Redis */
   connectionNameSuffix?: string;
 };
 
-const defaultOptions: Redis.RedisOptions = {
+const defaultOptions: RedisOptions = {
   maxRetriesPerRequest: 20,
   enableReadyCheck: false,
 
@@ -43,7 +43,7 @@ export default class RedisAdapter extends Redis {
 
     if (!url || !url.startsWith("ioredis://")) {
       super(
-        env.REDIS_URL,
+        env.REDIS_URL ?? "",
         defaults(options, { connectionName }, defaultOptions)
       );
     } else {
diff --git a/yarn.lock b/yarn.lock
index 1d7b0383c..742a5a2d5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1400,6 +1400,11 @@
   dependencies:
     "@babel/runtime" "^7.6.2"
 
+"@ioredis/commands@^1.1.1":
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@ioredis/commands/-/commands-1.2.0.tgz#6d61b3097470af1fdbbe622795b8921d42018e11"
+  integrity sha512-Sx1pU8EM64o2BrqNpEO1CNLtKQwyhuXuqyfH7oGKCk+1a33d2r5saW8zNwm3j6BTExtjrv2BxTgzzkMwts6vGg==
+
 "@istanbuljs/load-nyc-config@^1.0.0":
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz#fd3db1d59ecf7cf121e80650bb86712f9b55eced"
@@ -2669,14 +2674,6 @@
   resolved "https://registry.yarnpkg.com/@types/body-scroll-lock/-/body-scroll-lock-3.1.0.tgz#435f6abf682bf58640e1c2ee5978320b891970e7"
   integrity sha512-3owAC4iJub5WPqRhxd8INarF2bWeQq1yQHBgYhN0XLBJMpd5ED10RrJ3aKiAwlTyL5wK7RkBD4SZUQz2AAAMdA==
 
-"@types/bull@^3.15.9":
-  version "3.15.9"
-  resolved "https://registry.yarnpkg.com/@types/bull/-/bull-3.15.9.tgz#e10e0901ec3762bff85716b3c580277960751c93"
-  integrity sha512-MPUcyPPQauAmynoO3ezHAmCOhbB0pWmYyijr/5ctaCqhbKWsjW0YCod38ZcLzUBprosfZ9dPqfYIcfdKjk7RNQ==
-  dependencies:
-    "@types/ioredis" "*"
-    "@types/redis" "^2.8.0"
-
 "@types/cheerio@*":
   version "0.22.30"
   resolved "https://registry.yarnpkg.com/@types/cheerio/-/cheerio-0.22.30.tgz#6c1ded70d20d890337f0f5144be2c5e9ce0936e6"
@@ -2884,13 +2881,6 @@
   resolved "https://registry.yarnpkg.com/@types/invariant/-/invariant-2.2.35.tgz#cd3ebf581a6557452735688d8daba6cf0bd5a3be"
   integrity sha512-DxX1V9P8zdJPYQat1gHyY0xj3efl8gnMVjiM9iCY6y27lj+PoQWkgjt8jDqmovPqULkKVpKRg8J36iQiA+EtEg==
 
-"@types/ioredis@*", "@types/ioredis@^4.28.1":
-  version "4.28.1"
-  resolved "https://registry.yarnpkg.com/@types/ioredis/-/ioredis-4.28.1.tgz#27d66f4c0540145826d984b6d0a5b54bbb88c32a"
-  integrity sha512-raYHPqRWrfnEoym94BY28mG1+tcZqh3dsp2q7x5IyMAAEvIdu+H0X8diASMpncIm+oHyH9dalOeOnGOL/YnuOA==
-  dependencies:
-    "@types/node" "*"
-
 "@types/istanbul-lib-coverage@*", "@types/istanbul-lib-coverage@^2.0.0", "@types/istanbul-lib-coverage@^2.0.1":
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.3.tgz#4ba8ddb720221f432e443bd5f9117fd22cfd4762"
@@ -3401,13 +3391,6 @@
   resolved "https://registry.yarnpkg.com/@types/redis-info/-/redis-info-3.0.0.tgz#c925cd7249d71c3d9e12ef5b15168bdf26111b1d"
   integrity sha512-uvjYcIvPGAIJvnRT3y6jacP1Qqs3hNQLBeKDvDtJOh5ADISsMsMJK15WzP++cfRfAwb1ZafAXwC3YYC/uKAENQ==
 
-"@types/redis@^2.8.0":
-  version "2.8.32"
-  resolved "https://registry.yarnpkg.com/@types/redis/-/redis-2.8.32.tgz#1d3430219afbee10f8cfa389dad2571a05ecfb11"
-  integrity sha512-7jkMKxcGq9p242exlbsVzuJb57KqHRhNl4dHoQu2Y5v9bCAbtIXXH0R3HleSQW4CTOqpHIYUW3t6tpUj4BVQ+w==
-  dependencies:
-    "@types/node" "*"
-
 "@types/refractor@^3.0.2":
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/@types/refractor/-/refractor-3.0.2.tgz#2d42128d59f78f84d2c799ffc5ab5cadbcba2d82"
@@ -4932,15 +4915,15 @@ builtin-status-codes@^3.0.0:
   resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"
   integrity sha1-hZgoeOIbmOHGZCXgPQF0eI9Wnug=
 
-bull@^4.8.5:
-  version "4.8.5"
-  resolved "https://registry.yarnpkg.com/bull/-/bull-4.8.5.tgz#eebafddc3249d6d5e8ced1c42b8bfa8efcc274aa"
-  integrity sha512-2Z630e4f6VsLJnWMAtfEHwIqJYmND4W3dcG48RIbXeWpvb4UnYtpe/zxEdslJu0PKrltB4IkFj5YtBsdeQRn8w==
+bull@^4.10.2:
+  version "4.10.2"
+  resolved "https://registry.yarnpkg.com/bull/-/bull-4.10.2.tgz#af53545b394001755cf7c6b30bac295eeb5e0420"
+  integrity sha512-xa65xtWjQsLqYU/eNaXxq9VRG8xd6qNsQEjR7yjYuae05xKrzbVMVj2QgrYsTMmSs/vsqJjHqHSRRiW1+IkGXQ==
   dependencies:
     cron-parser "^4.2.1"
     debuglog "^1.0.0"
     get-port "^5.1.1"
-    ioredis "^4.28.5"
+    ioredis "^5.0.0"
     lodash "^4.17.21"
     msgpackr "^1.5.2"
     p-timeout "^3.2.0"
@@ -6279,7 +6262,7 @@ debug@3.1.0:
   dependencies:
     ms "2.0.0"
 
-debug@4, debug@^4.0.1, debug@^4.1.0, debug@^4.1.1, debug@^4.3.1, debug@^4.3.2, debug@^4.3.3, debug@^4.3.4, debug@~4.3.1, debug@~4.3.2:
+debug@4, debug@^4.0.1, debug@^4.1.0, debug@^4.1.1, debug@^4.3.2, debug@^4.3.3, debug@^4.3.4, debug@~4.3.1, debug@~4.3.2:
   version "4.3.4"
   resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
   integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
@@ -6407,11 +6390,16 @@ delegates@^1.0.0:
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
   integrity sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=
 
-denque@^1.1.0, denque@^1.5.0:
+denque@^1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/denque/-/denque-1.5.0.tgz#773de0686ff2d8ec2ff92914316a47b73b1c73de"
   integrity sha512-CYiCSgIF1p6EUByQPlGkKnP1M9g0ZV3qMIrqMqZqdwazygIA/YP2vrbcyl1h/WppKJTdl1F85cXIle+394iDAQ==
 
+denque@^2.0.1:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/denque/-/denque-2.1.0.tgz#e93e1a6569fb5e66f16a3c2a2964617d349d6ab1"
+  integrity sha512-HVQE3AAb/pxF8fQAoiqpvg9i3evqug3hoiwakOyZAwJm+6vZehbkYXZ0l4JxS+I3QxM97v5aaRNhj8v5oBhekw==
+
 depd@2.0.0, depd@^2.0.0, depd@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/depd/-/depd-2.0.0.tgz#b696163cc757560d09cf22cc8fad1571b79e76df"
@@ -8893,19 +8881,17 @@ invariant@^2.2.2, invariant@^2.2.4:
   dependencies:
     loose-envify "^1.0.0"
 
-ioredis@^4.28.5:
-  version "4.28.5"
-  resolved "https://registry.yarnpkg.com/ioredis/-/ioredis-4.28.5.tgz#5c149e6a8d76a7f8fa8a504ffc85b7d5b6797f9f"
-  integrity sha512-3GYo0GJtLqgNXj4YhrisLaNNvWSNwSS2wS4OELGfGxH8I69+XfNdnmV1AyN+ZqMh0i7eX+SWjrwFKDBDgfBC1A==
+ioredis@^5.0.0:
+  version "5.2.4"
+  resolved "https://registry.yarnpkg.com/ioredis/-/ioredis-5.2.4.tgz#9e262a668bc29bae98f2054c1e0d7efd86996b96"
+  integrity sha512-qIpuAEt32lZJQ0XyrloCRdlEdUUNGG9i0UOk6zgzK6igyudNWqEBxfH6OlbnOOoBBvr1WB02mm8fR55CnikRng==
   dependencies:
+    "@ioredis/commands" "^1.1.1"
     cluster-key-slot "^1.1.0"
-    debug "^4.3.1"
-    denque "^1.1.0"
+    debug "^4.3.4"
+    denque "^2.0.1"
     lodash.defaults "^4.2.0"
-    lodash.flatten "^4.4.0"
     lodash.isarguments "^3.1.0"
-    p-map "^2.1.0"
-    redis-commands "1.7.0"
     redis-errors "^1.2.0"
     redis-parser "^3.0.0"
     standard-as-callback "^2.1.0"
@@ -10578,11 +10564,6 @@ lodash.escape@^4.0.1:
   resolved "https://registry.yarnpkg.com/lodash.escape/-/lodash.escape-4.0.1.tgz#c9044690c21e04294beaa517712fded1fa88de98"
   integrity sha1-yQRGkMIeBClL6qUXcS/e0fqI3pg=
 
-lodash.flatten@^4.4.0:
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/lodash.flatten/-/lodash.flatten-4.4.0.tgz#f31c22225a9632d2bbf8e4addbef240aa765a61f"
-  integrity sha1-8xwiIlqWMtK7+OSt2+8kCqdlph8=
-
 lodash.flattendeep@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.flattendeep/-/lodash.flattendeep-4.4.0.tgz#fb030917f86a3134e5bc9bec0d69e0013ddfedb2"
@@ -11712,11 +11693,6 @@ p-locate@^5.0.0:
   dependencies:
     p-limit "^3.0.2"
 
-p-map@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/p-map/-/p-map-2.1.0.tgz#310928feef9c9ecc65b68b17693018a665cea175"
-  integrity sha512-y3b8Kpd8OAN444hxfBbFfj1FY/RjtTd8tzYwhUqNYXx0fXx2iX4maP4Qr6qhIKbQXI02wTLAda4fYUbDagTUFw==
-
 p-map@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/p-map/-/p-map-4.0.0.tgz#bb2f95a5eda2ec168ec9274e06a747c3e2904d2b"
@@ -13094,7 +13070,7 @@ rechoir@^0.7.0:
   dependencies:
     resolve "^1.9.0"
 
-redis-commands@1.7.0, redis-commands@^1.7.0:
+redis-commands@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/redis-commands/-/redis-commands-1.7.0.tgz#15a6fea2d58281e27b1cd1acfb4b293e278c3a89"
   integrity sha512-nJWqw3bTFy21hX/CPKHth6sfhZbdiHP6bTawSgQBlKOVRG7EZkfHbbHwQJnrE4vsQf0CMNE+3gJ4Fmm16vdVlQ==