diff --git a/packages/server/package.json b/packages/server/package.json
index 92d1fe1955..27abdf4b9c 100644
--- a/packages/server/package.json
+++ b/packages/server/package.json
@@ -74,6 +74,7 @@
     "pouchdb": "^7.2.1",
     "pouchdb-all-dbs": "^1.0.2",
     "pouchdb-replication-stream": "^1.2.9",
+    "sanitize-s3-objectkey": "^0.0.1",
     "squirrelly": "^7.5.0",
     "tar-fs": "^2.1.0",
     "uuid": "^3.3.2",
diff --git a/packages/server/src/api/controllers/deploy/aws.js b/packages/server/src/api/controllers/deploy/aws.js
index ac8b62df54..30ee86846b 100644
--- a/packages/server/src/api/controllers/deploy/aws.js
+++ b/packages/server/src/api/controllers/deploy/aws.js
@@ -3,6 +3,7 @@ const { join } = require("../../../utilities/centralPath")
 const AWS = require("aws-sdk")
 const fetch = require("node-fetch")
 const uuid = require("uuid")
+const sanitize = require("sanitize-s3-objectkey")
 const { budibaseAppsDir } = require("../../../utilities/budibaseDir")
 const PouchDB = require("../../../db")
 const environment = require("../../../environment")
@@ -137,7 +138,8 @@ async function prepareUploadForS3({ s3Key, metadata, s3, file }) {
 
   const upload = await s3
     .upload({
-      Key: s3Key,
+      // windows filepaths need to be converted to forward slashes for s3
+      Key: sanitize(s3Key).replace(/\\/g, "/"),
       Body: fileBytes,
       ContentType: file.type || CONTENT_TYPE_MAP[extension.toLowerCase()],
       Metadata: metadata,
diff --git a/packages/server/yarn.lock b/packages/server/yarn.lock
index 8da3e90992..cc6a732c07 100644
--- a/packages/server/yarn.lock
+++ b/packages/server/yarn.lock
@@ -3825,6 +3825,11 @@ is-bigint@^1.0.0:
   resolved "https://registry.yarnpkg.com/is-bigint/-/is-bigint-1.0.0.tgz#73da8c33208d00f130e9b5e15d23eac9215601c4"
   integrity sha512-t5mGUXC/xRheCK431ylNiSkGGpBp8bHENBcENTkDT6ppwPzEVxNGZRvgvmOEfbWkFhA7D2GEuE2mmQTr78sl2g==
 
+is-bigint@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-bigint/-/is-bigint-1.0.0.tgz#73da8c33208d00f130e9b5e15d23eac9215601c4"
+  integrity sha512-t5mGUXC/xRheCK431ylNiSkGGpBp8bHENBcENTkDT6ppwPzEVxNGZRvgvmOEfbWkFhA7D2GEuE2mmQTr78sl2g==
+
 is-binary-path@~2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-2.1.0.tgz#ea1f7f3b80f064236e83470f86c09c254fb45b09"
@@ -6743,6 +6748,11 @@ sanitize-filename@^1.6.2, sanitize-filename@^1.6.3:
   dependencies:
     truncate-utf8-bytes "^1.0.0"
 
+sanitize-s3-objectkey@^0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/sanitize-s3-objectkey/-/sanitize-s3-objectkey-0.0.1.tgz#efa9887cd45275b40234fb4bb12fc5754fe64e7e"
+  integrity sha512-ZTk7aqLxy4sD40GWcYWoLfbe05XLmkKvh6vGKe13ADlei24xlezcvjgKy1qRArlaIbIMYaqK7PCalvZtulZlaQ==
+
 sax@1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.1.tgz#7b8e656190b228e81a66aea748480d828cd2d37a"
@@ -7918,6 +7928,18 @@ which-typed-array@^1.1.2:
     has-symbols "^1.0.1"
     is-typed-array "^1.1.3"
 
+which-typed-array@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/which-typed-array/-/which-typed-array-1.1.2.tgz#e5f98e56bda93e3dac196b01d47c1156679c00b2"
+  integrity sha512-KT6okrd1tE6JdZAy3o2VhMoYPh3+J6EMZLyrxBQsZflI1QCZIxMrIYLkosd8Twf+YfknVIHmYQPgJt238p8dnQ==
+  dependencies:
+    available-typed-arrays "^1.0.2"
+    es-abstract "^1.17.5"
+    foreach "^2.0.5"
+    function-bind "^1.1.1"
+    has-symbols "^1.0.1"
+    is-typed-array "^1.1.3"
+
 which@^1.2.9, which@^1.3.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"