diff --git a/package.json b/package.json
index 294bf9099..df76252e9 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "jsome": "^2.5.0",
     "markdownlint-cli2": "^0.3.2",
     "pa11y-ci": "https://github.com/pa11y/pa11y-ci/archive/5c842cf1b9fe2867b70ff5354851d985be8d71c4.tar.gz",
-    "prettier": "^2.7.1",
+    "prettier": "^3.4.0",
     "typescript": "^5.7.2",
     "wiremock-rest-client": "^1.10.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 5fd6a7d42..5e5c953be 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4222,10 +4222,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@^2.7.1:
-  version "2.7.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.7.1.tgz#e235806850d057f97bb08368a4f7d899f7760c64"
-  integrity sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g==
+prettier@^3.4.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.4.0.tgz#9dcd5e617cf103db8e4bd00924baecfd32bf9971"
+  integrity sha512-/OXNZcLyWkfo13ofOW5M7SLh+k5pnIs07owXK2teFpnfaOEcycnSy7HQxldaVX1ZP/7Q8oO1eDuQJNwbomQq5Q==
 
 pretty-bytes@^5.6.0:
   version "5.6.0"