diff --git a/.changeset/hip-trees-compare.md b/.changeset/hip-trees-compare.md
new file mode 100644
index 000000000..e3d4105e3
--- /dev/null
+++ b/.changeset/hip-trees-compare.md
@@ -0,0 +1,5 @@
+---
+"backend": patch
+---
+
+Update csrf.ts
diff --git a/packages/backend/src/auth/csrf.ts b/packages/backend/src/auth/csrf.ts
index e6e2ae954..89af5801f 100644
--- a/packages/backend/src/auth/csrf.ts
+++ b/packages/backend/src/auth/csrf.ts
@@ -34,6 +34,6 @@ export const csrfPlugin = fastifyPlugin(
   },
   {
     name: "csrf",
-    fastify: "4.x",
+    fastify: "5.x",
   },
 );