diff --git a/package.json b/package.json
index 8add7366..6600b4ae 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,6 @@
   },
   "devDependencies": {
     "@sourcegraph/prettierrc": "3.0.2",
-    "prettier": "1.19.1"
+    "prettier": "3.9.5"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index f9a81fe4..77b9c26b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7,7 +7,7 @@
   resolved "https://registry.yarnpkg.com/@sourcegraph/prettierrc/-/prettierrc-3.0.2.tgz#a8fb80ed5712a59cd60eb62f0969090ebc386a80"
   integrity sha512-HCEKIIgOLap22yvnMcr+v6X/1LK6LuVd5MhGLxjYsb7irI2KNEQpalR5SKjsfYPawzVcgCPu1QsD0Oy4iGdPuA==
 
-prettier@1.19.1:
-  version "1.19.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
-  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
+prettier@3.9.5:
+  version "3.9.5"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.9.5.tgz#4fec97736e33b9d0b620b48914fe93b530e835ad"
+  integrity sha512-/FVl766LpUfB5vXgCYOYa0MeV/441Ia99AeICQIQFTY/Nw0roZwULcXpku5i1/m5kt/baz+s4Zogspd839HSMg==