diff --git a/package.json b/package.json
index 6c06908..38e59e0 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "@sozialhelden/ietf-language-tags": "^3.2.4",
     "axios": "^0.21.1",
     "body-parser": "^1.19.0",
-    "bootstrap": "^4.5.2",
+    "bootstrap": "^5.1.3",
     "bootstrap-vue": "^2.17.3",
     "core-js": "^3.6.5",
     "dotenv": "^8.2.0",
diff --git a/yarn.lock b/yarn.lock
index 490df99..348dcd8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2214,11 +2214,16 @@ bootstrap-vue@^2.17.3:
     portal-vue "^2.1.7"
     vue-functional-data-merge "^3.1.0"
 
-"bootstrap@>=4.5.3 <5.0.0", bootstrap@^4.5.2:
+"bootstrap@>=4.5.3 <5.0.0":
   version "4.5.3"
   resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.5.3.tgz#c6a72b355aaf323920be800246a6e4ef30997fe6"
   integrity sha512-o9ppKQioXGqhw8Z7mah6KdTYpNQY//tipnkxppWhPbiSWdD+1raYsnhwEZjkTHYbGee4cVQ0Rx65EhOY/HNLcQ==
 
+bootstrap@^5.1.3:
+  version "5.1.3"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-5.1.3.tgz#ba081b0c130f810fa70900acbc1c6d3c28fa8f34"
+  integrity sha512-fcQztozJ8jToQWXxVuEyXWW+dSo8AiXWKwiSSrKWsRB/Qt+Ewwza+JWoLKiTuQLaEPhdNAJ7+Dosc9DOIqNy7Q==
+
 boxen@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/boxen/-/boxen-4.2.0.tgz#e411b62357d6d6d36587c8ac3d5d974daa070e64"