diff --git a/Gemfile b/Gemfile
index 4bcc517..d58ed49 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 6.1.0'
 gem 'sass-rails', '~> 6.0'
 gem 'turbolinks', '~> 5.0'
 gem 'webpacker', '~> 5.0'
-
+gem "nokogiri", ">= 1.12.5"
 gem 'bootsnap', '< 1.7.2', require: false
 gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw]
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d937374..8ebbd84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -380,6 +380,7 @@ DEPENDENCIES
   high_voltage
   icalendar
   letter_opener
+  nokogiri (>= 1.12.5)
   pagy
   pg
   puma (~> 5.0)
diff --git a/package.json b/package.json
index 87d253f..d310ea3 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,9 @@
     "turbolinks": "^5.2.0"
   },
   "devDependencies": {
+    "ansi-regex": "^5.0.1",
+    "nth-check": "^2.0.1",
+    "set-value": "^4.0.1",
     "webpack": "^4.0.0",
     "webpack-cli": "^3.3.1",
     "webpack-dev-server": "^3.11.0"
diff --git a/yarn.lock b/yarn.lock
index 2c2cc8c..c657802 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1330,6 +1330,11 @@ ansi-regex@^4.1.0:
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-4.1.0.tgz#8b9f8f08cf1acb843756a839ca8c7e3168c51997"
   integrity sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==
 
+ansi-regex@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.1.tgz#082cb2c89c9fe8659a311a53bd6a4dc5301db304"
+  integrity sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==
+
 ansi-styles@^3.2.0, ansi-styles@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
@@ -3781,6 +3786,11 @@ is-plain-object@^2.0.3, is-plain-object@^2.0.4:
   dependencies:
     isobject "^3.0.1"
 
+is-primitive@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-3.0.1.tgz#98c4db1abff185485a657fc2905052b940524d05"
+  integrity sha512-GljRxhWvlCNRfZyORiH77FwdFwGcMO620o37EOYC0ORWdq+WYNVqW0w2Juzew4M+L81l6/QS3t5gkkihyRqv9w==
+
 is-regex@^1.0.4, is-regex@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.1.4.tgz#eef5663cd59fa4c0ae339505323df6854bb15958"
@@ -4464,6 +4474,13 @@ nth-check@^1.0.2:
   dependencies:
     boolbase "~1.0.0"
 
+nth-check@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/nth-check/-/nth-check-2.0.1.tgz#2efe162f5c3da06a28959fbd3db75dbeea9f0fc2"
+  integrity sha512-it1vE95zF6dTT9lBsYbxvqh0Soy4SPowchj0UBGj/V6cTPnXXtQOPUbhZ6CmGzAD/rW22LQK6E96pcdJXk4A4w==
+  dependencies:
+    boolbase "^1.0.0"
+
 num2fraction@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/num2fraction/-/num2fraction-1.2.2.tgz#6f682b6a027a4e9ddfa4564cd2589d1d4e669ede"
@@ -6041,6 +6058,14 @@ set-value@^2.0.0, set-value@^2.0.1:
     is-plain-object "^2.0.3"
     split-string "^3.0.1"
 
+set-value@^4.0.1:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/set-value/-/set-value-4.1.0.tgz#aa433662d87081b75ad88a4743bd450f044e7d09"
+  integrity sha512-zTEg4HL0RwVrqcWs3ztF+x1vkxfm0lP+MQQFPiMJTKVceBwEV0A569Ou8l9IYQG8jOZdMVI1hGsc0tmeD2o/Lw==
+  dependencies:
+    is-plain-object "^2.0.4"
+    is-primitive "^3.0.1"
+
 setimmediate@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"