diff --git a/backend/package.json b/backend/package.json
index 29f2087a2..3f6a1644e 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -85,7 +85,7 @@
     "nodemailer": "^6.4.4",
     "nodemailer-html-to-text": "^3.2.0",
     "request": "~2.88.2",
-    "sanitize-html": "~1.22.0",
+    "sanitize-html": "~2.11.0",
     "slug": "~6.0.0",
     "subscriptions-transport-ws": "^0.9.19",
     "trunc-html": "~1.1.2",
diff --git a/backend/yarn.lock b/backend/yarn.lock
index 8554acf3c..0c6c31cc7 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -3793,7 +3793,7 @@ chalk@2.3.0:
     escape-string-regexp "^1.0.5"
     supports-color "^4.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.4.1, chalk@^2.4.2:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.4.2:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -4642,14 +4642,6 @@ dom-serializer@0:
     domelementtype "^2.0.1"
     entities "^2.0.0"
 
-dom-serializer@^0.2.1:
-  version "0.2.2"
-  resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-0.2.2.tgz#1afb81f533717175d478655debc5e332d9f9bb51"
-  integrity sha512-2/xPb3ORsQ42nHYiSunXkDjPLBaEj/xTwUO4B7XCZQTRk7EBtTOPaygh10YAAh2OI1Qrp6NWfpAhzswj0ydt9g==
-  dependencies:
-    domelementtype "^2.0.1"
-    entities "^2.0.0"
-
 dom-serializer@^1.0.1:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/dom-serializer/-/dom-serializer-1.3.2.tgz#6206437d32ceefaec7161803230c7a20bc1b4d91"
@@ -4717,13 +4709,6 @@ domhandler@^2.3.0:
   dependencies:
     domelementtype "1"
 
-domhandler@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/domhandler/-/domhandler-3.0.0.tgz#51cd13efca31da95bbb0c5bee3a48300e333b3e9"
-  integrity sha512-eKLdI5v9m67kbXQbJSNn1zjh0SDzvzWVWtX+qEI3eMjZw8daH9k8rlj1FZY9memPwjiskQFbe7vHVVJIAqoEhw==
-  dependencies:
-    domelementtype "^2.0.1"
-
 domhandler@^4.0.0, domhandler@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/domhandler/-/domhandler-4.2.0.tgz#f9768a5f034be60a89a27c2e4d0f74eba0d8b059"
@@ -4754,15 +4739,6 @@ domutils@^1.5.1:
     dom-serializer "0"
     domelementtype "1"
 
-domutils@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/domutils/-/domutils-2.0.0.tgz#15b8278e37bfa8468d157478c58c367718133c08"
-  integrity sha512-n5SelJ1axbO636c2yUtOGia/IcJtVtlhQbFiVDBZHKV5ReJO1ViX7sFEemtuyoAnBxk5meNSYgA8V4s0271efg==
-  dependencies:
-    dom-serializer "^0.2.1"
-    domelementtype "^2.0.1"
-    domhandler "^3.0.0"
-
 domutils@^2.5.2:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/domutils/-/domutils-2.7.0.tgz#8ebaf0c41ebafcf55b0b72ec31c56323712c5442"
@@ -4883,7 +4859,7 @@ entities@^2.0.0:
   resolved "https://registry.yarnpkg.com/entities/-/entities-2.0.0.tgz#68d6084cab1b079767540d80e56a39b423e4abf4"
   integrity sha512-D9f7V0JSRwIxlRI2mjMqufDrRDnx8p+eEOz7aUM9SuvF8gsBzra0/6tbjl1m8eQHrZlYj6PxqE00hZ1SAIKPLw==
 
-entities@^4.2.0, entities@^4.3.0, entities@^4.4.0:
+entities@^4.2.0, entities@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/entities/-/entities-4.4.0.tgz#97bdaba170339446495e653cfd2db78962900174"
   integrity sha512-oYp7156SP8LkeGD0GF85ad1X9Ai79WtRsZ2gxJqtBuzH+98YUV6jkHEKlZkMbcrjJjIVJNIDP/3WL9wQkoPbWA==
@@ -6399,16 +6375,6 @@ htmlparser2@^3.9.1:
     inherits "^2.0.1"
     readable-stream "^3.1.1"
 
-htmlparser2@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-4.1.0.tgz#9a4ef161f2e4625ebf7dfbe6c0a2f52d18a59e78"
-  integrity sha512-4zDq1a1zhE4gQso/c5LP1OtrhYTncXNSpvJYtWJBtXAETPlMfi3IFNjGuQbYLuVY4ZR0QMqRVvo4Pdy9KLyP8Q==
-  dependencies:
-    domelementtype "^2.0.1"
-    domhandler "^3.0.0"
-    domutils "^2.0.0"
-    entities "^2.0.0"
-
 htmlparser2@^6.1.0:
   version "6.1.0"
   resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-6.1.0.tgz#c4d762b6c3371a05dbe65e94ae43a9f845fb8fb7"
@@ -6419,15 +6385,15 @@ htmlparser2@^6.1.0:
     domutils "^2.5.2"
     entities "^2.0.0"
 
-htmlparser2@^8.0.1:
-  version "8.0.1"
-  resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-8.0.1.tgz#abaa985474fcefe269bc761a779b544d7196d010"
-  integrity sha512-4lVbmc1diZC7GUJQtRQ5yBAeUCL1exyMwmForWkRLnwyzWBFxN633SALPMGYaWZvKe9j1pRZJpauvmxENSp/EA==
+htmlparser2@^8.0.0, htmlparser2@^8.0.1:
+  version "8.0.2"
+  resolved "https://registry.yarnpkg.com/htmlparser2/-/htmlparser2-8.0.2.tgz#f002151705b383e62433b5cf466f5b716edaec21"
+  integrity sha512-GYdjWKDkbRLkZ5geuHs5NY1puJ+PXwP7+fHPRz06Eirsb9ugf6d8kkXav6ADhcODhFFPMIXyxkxSuMf3D6NCFA==
   dependencies:
     domelementtype "^2.3.0"
-    domhandler "^5.0.2"
+    domhandler "^5.0.3"
     domutils "^3.0.1"
-    entities "^4.3.0"
+    entities "^4.4.0"
 
 http-cache-semantics@^4.0.0:
   version "4.0.3"
@@ -7010,6 +6976,11 @@ is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   dependencies:
     isobject "^3.0.1"
 
+is-plain-object@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-5.0.0.tgz#4427f50ab3429e9025ea7d52e9043a9ef4159344"
+  integrity sha512-VRSzKkbMm5jMDoKLbltAkFQ5Qr7VDiTFGXxYFXXowVj387GeGNOCsOH6Msy00SGZ3Fp84b1Naa1psqgcCIEP5Q==
+
 is-potential-custom-element-name@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-potential-custom-element-name/-/is-potential-custom-element-name-1.0.1.tgz#171ed6f19e3ac554394edf78caa05784a45bebb5"
@@ -8007,11 +7978,6 @@ lodash-es@^4.17.11:
   resolved "https://registry.yarnpkg.com/lodash-es/-/lodash-es-4.17.15.tgz#21bd96839354412f23d7a10340e5eac6ee455d78"
   integrity sha512-rlrc3yU3+JNOpZ9zj5pQtxnx2THmvRykwL4Xlxoa8I9lHBlVbbyPhgyPMioxVZ4NqyxaVVtaJnzsyOidQIhyyQ==
 
-lodash.clonedeep@^4.5.0:
-  version "4.5.0"
-  resolved "https://registry.yarnpkg.com/lodash.clonedeep/-/lodash.clonedeep-4.5.0.tgz#e23f3f9c4f8fbdde872529c1071857a086e5ccef"
-  integrity sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8=
-
 lodash.debounce@^4.0.8:
   version "4.0.8"
   resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
@@ -8022,11 +7988,6 @@ lodash.defaults@^4.2.0:
   resolved "https://registry.yarnpkg.com/lodash.defaults/-/lodash.defaults-4.2.0.tgz#d09178716ffea4dde9e5fb7b37f6f0802274580c"
   integrity sha1-0JF4cW/+pN3p5ft7N/bwgCJ0WAw=
 
-lodash.escaperegexp@^4.1.2:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/lodash.escaperegexp/-/lodash.escaperegexp-4.1.2.tgz#64762c48618082518ac3df4ccf5d5886dae20347"
-  integrity sha1-ZHYsSGGAglGKw99Mz11YhtriA0c=
-
 lodash.flatten@^4.4.0:
   version "4.4.0"
   resolved "https://registry.yarnpkg.com/lodash.flatten/-/lodash.flatten-4.4.0.tgz#f31c22225a9632d2bbf8e4addbef240aa765a61f"
@@ -8072,11 +8033,6 @@ lodash.merge@^4.6.2:
   resolved "https://registry.yarnpkg.com/lodash.merge/-/lodash.merge-4.6.2.tgz#558aa53b43b661e1925a0afdfa36a9a1085fe57a"
   integrity sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==
 
-lodash.mergewith@^4.6.2:
-  version "4.6.2"
-  resolved "https://registry.yarnpkg.com/lodash.mergewith/-/lodash.mergewith-4.6.2.tgz#617121f89ac55f59047c7aec1ccd6654c6590f55"
-  integrity sha512-GK3g5RPZWTRSeLSpgP8Xhra+pnjBC56q9FZYe1d5RN3TJ35dbkGy3YqBSMbyCrlbi+CM9Z3Jk5yTL7RCsqboyQ==
-
 lodash.once@^4.0.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/lodash.once/-/lodash.once-4.1.1.tgz#0dd3971213c7c56df880977d504c88fb471a97ac"
@@ -8703,6 +8659,11 @@ nan@2.17.0, nan@^2.12.1, nan@^2.17.0:
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.17.0.tgz#c0150a2368a182f033e9aa5195ec76ea41a199cb"
   integrity sha512-2ZTgtl0nJsO0KQCjEpxcIr5D+Yv90plTitZt9JBfQvVJDS5seMl3FOvsh3+9CoYWXf/1l5OaZzzF6nDm4cagaQ==
 
+nanoid@^3.3.6:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.7.tgz#d0c301a691bc8d54efa0a2226ccf3fe2fd656bd8"
+  integrity sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -9310,6 +9271,11 @@ parse-passwd@^1.0.0:
   resolved "https://registry.yarnpkg.com/parse-passwd/-/parse-passwd-1.0.0.tgz#6d5b934a456993b23d37f40a382d6f1666a8e5c6"
   integrity sha1-bVuTSkVpk7I9N/QKOC1vFmao5cY=
 
+parse-srcset@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/parse-srcset/-/parse-srcset-1.0.2.tgz#f2bd221f6cc970a938d88556abc589caaaa2bde1"
+  integrity sha512-/2qh0lav6CmI15FzA3i/2Bzk2zCgQhGMkvhOhKNcBVQ1ldgpbfiNTVslmooUmWJcADi1f1kIeynbDRVzNlfR6Q==
+
 parse-uri@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/parse-uri/-/parse-uri-1.0.0.tgz#2872dcc22f1a797acde1583d8a0ac29552ddac20"
@@ -9476,14 +9442,14 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha512-xTgYBc3fuo7Yt7JbiuFxSYGToMoz8fLoE6TC9Wx1P/u+LfeThMOAqmuyECnlBaaJb+u1m9hHiXUEtwW4OzfUJg==
 
-postcss@^7.0.27:
-  version "7.0.27"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.27.tgz#cc67cdc6b0daa375105b7c424a85567345fc54d9"
-  integrity sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==
+postcss@^8.3.11:
+  version "8.4.31"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
+  integrity sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==
   dependencies:
-    chalk "^2.4.2"
-    source-map "^0.6.1"
-    supports-color "^6.1.0"
+    nanoid "^3.3.6"
+    picocolors "^1.0.0"
+    source-map-js "^1.0.2"
 
 prelude-ls@^1.2.1:
   version "1.2.1"
@@ -10106,21 +10072,17 @@ sane@^4.0.3:
     minimist "^1.1.1"
     walker "~1.0.5"
 
-sanitize-html@~1.22.0:
-  version "1.22.1"
-  resolved "https://registry.yarnpkg.com/sanitize-html/-/sanitize-html-1.22.1.tgz#5b36c92ab27917ddd2775396815c2bc1a6268310"
-  integrity sha512-++IMC00KfMQc45UWZJlhWOlS9eMrME38sFG9GXfR+k6oBo9JXSYQgTOZCl9j3v/smFTRNT9XNwz5DseFdMY+2Q==
+sanitize-html@~2.11.0:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/sanitize-html/-/sanitize-html-2.11.0.tgz#9a6434ee8fcaeddc740d8ae7cd5dd71d3981f8f6"
+  integrity sha512-BG68EDHRaGKqlsNjJ2xUB7gpInPA8gVx/mvjO743hZaeMCZ2DwzW7xvsqZ+KNU4QKwj86HJ3uu2liISf2qBBUA==
   dependencies:
-    chalk "^2.4.1"
-    htmlparser2 "^4.1.0"
-    lodash.clonedeep "^4.5.0"
-    lodash.escaperegexp "^4.1.2"
-    lodash.isplainobject "^4.0.6"
-    lodash.isstring "^4.0.1"
-    lodash.mergewith "^4.6.2"
-    postcss "^7.0.27"
-    srcset "^2.0.1"
-    xtend "^4.0.1"
+    deepmerge "^4.2.2"
+    escape-string-regexp "^4.0.0"
+    htmlparser2 "^8.0.0"
+    is-plain-object "^5.0.0"
+    parse-srcset "^1.0.2"
+    postcss "^8.3.11"
 
 sax@1.2.1:
   version "1.2.1"
@@ -10372,6 +10334,11 @@ socks@^2.6.2:
     ip "^2.0.0"
     smart-buffer "^4.2.0"
 
+source-map-js@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.0.2.tgz#adbc361d9c62df380125e7f161f71c826f1e490c"
+  integrity sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==
+
 source-map-resolve@^0.5.0:
   version "0.5.3"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.3.tgz#190866bece7553e1f8f267a2ee82c606b5509a1a"
@@ -10436,11 +10403,6 @@ sprintf-js@~1.0.2:
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
   integrity sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==
 
-srcset@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/srcset/-/srcset-2.0.1.tgz#8f842d357487eb797f413d9c309de7a5149df5ac"
-  integrity sha512-00kZI87TdRKwt+P8jj8UZxbfp7mK2ufxcIMWvhAOZNJTRROimpHeruWrGvCZneiuVDLqdyHefVp748ECTnyUBQ==
-
 sshpk@^1.7.0:
   version "1.17.0"
   resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.17.0.tgz#578082d92d4fe612b13007496e543fa0fbcbe4c5"
@@ -10699,13 +10661,6 @@ supports-color@^5.3.0, supports-color@^5.5.0:
   dependencies:
     has-flag "^3.0.0"
 
-supports-color@^6.1.0:
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-6.1.0.tgz#0764abc69c63d5ac842dd4867e8d025e880df8f3"
-  integrity sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==
-  dependencies:
-    has-flag "^3.0.0"
-
 supports-color@^7.0.0, supports-color@^7.1.0:
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-7.2.0.tgz#1b7dcdcb32b8138801b3e478ba6a51caa89648da"
@@ -11730,11 +11685,6 @@ xss@^1.0.6:
     commander "^2.20.3"
     cssfilter "0.0.10"
 
-xtend@^4.0.1:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
-  integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
-
 y18n@^5.0.5:
   version "5.0.8"
   resolved "https://registry.yarnpkg.com/y18n/-/y18n-5.0.8.tgz#7f4934d0f7ca8c56f95314939ddcd2dd91ce1d55"