diff --git a/.changeset/strong-snails-stare.md b/.changeset/strong-snails-stare.md
new file mode 100644
index 00000000000..2f472c510ab
--- /dev/null
+++ b/.changeset/strong-snails-stare.md
@@ -0,0 +1,5 @@
+---
+"@remix-run/node": patch
+---
+
+Fix race condition with non-atomic writes for file storage.
diff --git a/contributors.yml b/contributors.yml
index c6b27d8c189..c73b9205937 100644
--- a/contributors.yml
+++ b/contributors.yml
@@ -351,6 +351,7 @@
 - michaelgmcd
 - michaelhelvey
 - michaseel
+- midgleyc
 - mikeybinnswebdesign
 - mirzafaizan
 - mitchelldirt
diff --git a/packages/remix-node/package.json b/packages/remix-node/package.json
index 7d2ef6a4067..b3d39dc8afa 100644
--- a/packages/remix-node/package.json
+++ b/packages/remix-node/package.json
@@ -25,11 +25,13 @@
     "abort-controller": "^3.0.0",
     "cookie-signature": "^1.1.0",
     "source-map-support": "^0.5.21",
-    "stream-slice": "^0.1.2"
+    "stream-slice": "^0.1.2",
+    "write-file-atomic": "^5.0.0"
   },
   "devDependencies": {
     "@types/cookie-signature": "^1.0.3",
-    "@types/source-map-support": "^0.5.4"
+    "@types/source-map-support": "^0.5.4",
+    "@types/write-file-atomic": "^4.0.0"
   },
   "engines": {
     "node": ">=14"
diff --git a/packages/remix-node/sessions/fileStorage.ts b/packages/remix-node/sessions/fileStorage.ts
index 9f690801058..5c8e95e1cea 100644
--- a/packages/remix-node/sessions/fileStorage.ts
+++ b/packages/remix-node/sessions/fileStorage.ts
@@ -6,6 +6,7 @@ import type {
   SessionIdStorageStrategy,
   SessionData,
 } from "@remix-run/server-runtime";
+import writeFile from "write-file-atomic";
 
 import { createSessionStorage } from "../implementations";
 
@@ -86,7 +87,7 @@ export function createFileSessionStorage<Data = SessionData, FlashData = Data>({
       let content = JSON.stringify({ data, expires });
       let file = getFile(dir, id);
       await fsp.mkdir(path.dirname(file), { recursive: true });
-      await fsp.writeFile(file, content, "utf-8");
+      await writeFile(file, content, "utf-8");
     },
     async deleteData(id) {
       // Return early if the id is empty, otherwise we'll end up trying to
diff --git a/yarn.lock b/yarn.lock
index 0c5565c5c96..d2ee01a80e7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3344,6 +3344,13 @@
   resolved "https://registry.npmjs.org/@types/unist/-/unist-2.0.6.tgz"
   integrity sha512-PBjIUxZHOuj0R15/xuwJYjFi+KZdNFrehocChv4g5hu6aFroHue8m0lBP0POdK2nKzbw0cgV1mws8+V/JAcEkQ==
 
+"@types/write-file-atomic@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.npmjs.org/@types/write-file-atomic/-/write-file-atomic-4.0.0.tgz#ffcedcb1ae027e0a28ddfe218b72b3573797b5bc"
+  integrity sha512-piEKt2KKBUtye+feTlfdPjtW7uPFsAaLNX3/f6AJD+Y1T1YPTFwnqtlO9Y+gy9qGshrvxKa/Kay9vqbyVIuhwQ==
+  dependencies:
+    "@types/node" "*"
+
 "@types/ws@^7.4.1":
   version "7.4.7"
   resolved "https://registry.npmjs.org/@types/ws/-/ws-7.4.7.tgz"
@@ -11946,6 +11953,11 @@ signal-exit@^3.0.2, signal-exit@^3.0.3:
   resolved "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz"
   integrity sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==
 
+signal-exit@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.npmjs.org/signal-exit/-/signal-exit-4.0.1.tgz#96a61033896120ec9335d96851d902cc98f0ba2a"
+  integrity sha512-uUWsN4aOxJAS8KOuf3QMyFtgm1pkb6I+KRZbRF/ghdf5T7sM+B1lLLzPDxswUjkmHyxQAVzEgG35E3NzDM9GVw==
+
 simple-git@^3.16.0:
   version "3.16.0"
   resolved "https://registry.npmjs.org/simple-git/-/simple-git-3.16.0.tgz#421773e24680f5716999cc4a1d60127b4b6a9dec"
@@ -13569,6 +13581,14 @@ write-file-atomic@^3.0.0:
     signal-exit "^3.0.2"
     typedarray-to-buffer "^3.1.5"
 
+write-file-atomic@^5.0.0:
+  version "5.0.1"
+  resolved "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-5.0.1.tgz#68df4717c55c6fa4281a7860b4c2ba0a6d2b11e7"
+  integrity sha512-+QU2zd6OTD8XWIJCbffaiQeH9U73qIqafo1x6V1snCWYGJf6cVE0cDR4D8xRzcEnfI21IFrUPzPGtcPf8AC+Rw==
+  dependencies:
+    imurmurhash "^0.1.4"
+    signal-exit "^4.0.1"
+
 ws@^7.4.5, ws@^7.4.6:
   version "7.5.7"
   resolved "https://registry.npmjs.org/ws/-/ws-7.5.7.tgz"