diff --git a/package.json b/package.json
index e3034e1d..dc9c6234 100644
--- a/package.json
+++ b/package.json
@@ -92,7 +92,7 @@
     "loader.js": "4.7.0",
     "mocha": "10.8.2",
     "nyc": "17.1.0",
-    "prettier": "3.3.3",
+    "prettier": "3.4.0",
     "qunit": "2.22.0",
     "release-it": "16.3.0",
     "rsvp": "4.8.5",
diff --git a/yarn.lock b/yarn.lock
index b56a54a9..3142a9c4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14333,10 +14333,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@3.3.3:
-  version "3.3.3"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.3.3.tgz#30c54fe0be0d8d12e6ae61dbb10109ea00d53105"
-  integrity sha512-i2tDNA0O5IrMO757lfrdQZCc2jPNDVntV0m/+4whiDfWaTKfMNgR7Qz0NAeGz/nRqF4m5/6CLzbP4/liHt12Ew==
+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==
 
 prettier@^2.5.1:
   version "2.8.8"