diff --git a/.changeset/techdocs-tender-bugs-sort.md b/.changeset/techdocs-tender-bugs-sort.md
new file mode 100644
index 0000000000..be670b06ff
--- /dev/null
+++ b/.changeset/techdocs-tender-bugs-sort.md
@@ -0,0 +1,5 @@
+---
+'@backstage/techdocs-common': patch
+---
+
+Updated to properly join URL segments under any OS for both AWS S3 and GCP
diff --git a/packages/techdocs-common/src/stages/publish/awsS3.ts b/packages/techdocs-common/src/stages/publish/awsS3.ts
index 29eecb8d03..f0616e4cd3 100644
--- a/packages/techdocs-common/src/stages/publish/awsS3.ts
+++ b/packages/techdocs-common/src/stages/publish/awsS3.ts
@@ -306,7 +306,7 @@ export class AwsS3Publish implements PublisherBase {
           ? entityTriplet
           : lowerCaseEntityTriplet(entityTriplet);
 
-        const entityRootDir = path.join(this.bucketRootPath, entityDir);
+        const entityRootDir = path.posix.join(this.bucketRootPath, entityDir);
 
         const stream = this.storageClient
           .getObject({
@@ -357,7 +357,7 @@ export class AwsS3Publish implements PublisherBase {
         : lowerCaseEntityTripletInStoragePath(decodedUriNoRoot);
 
       // Re-prepend the root path to the relative file path
-      const filePath = path.join(this.bucketRootPath, filePathNoRoot);
+      const filePath = path.posix.join(this.bucketRootPath, filePathNoRoot);
 
       // Files with different extensions (CSS, HTML) need to be served with different headers
       const fileExtension = path.extname(filePath);
@@ -396,7 +396,7 @@ export class AwsS3Publish implements PublisherBase {
         ? entityTriplet
         : lowerCaseEntityTriplet(entityTriplet);
 
-      const entityRootDir = path.join(this.bucketRootPath, entityDir);
+      const entityRootDir = path.posix.join(this.bucketRootPath, entityDir);
 
       await this.storageClient
         .headObject({
diff --git a/packages/techdocs-common/src/stages/publish/googleStorage.ts b/packages/techdocs-common/src/stages/publish/googleStorage.ts
index 5a142e800a..77c366315c 100644
--- a/packages/techdocs-common/src/stages/publish/googleStorage.ts
+++ b/packages/techdocs-common/src/stages/publish/googleStorage.ts
@@ -231,7 +231,7 @@ export class GoogleGCSPublish implements PublisherBase {
         ? entityTriplet
         : lowerCaseEntityTriplet(entityTriplet);
 
-      const entityRootDir = path.join(this.bucketRootPath, entityDir);
+      const entityRootDir = path.posix.join(this.bucketRootPath, entityDir);
 
       const fileStreamChunks: Array<any> = [];
       this.storageClient
@@ -270,7 +270,7 @@ export class GoogleGCSPublish implements PublisherBase {
         : lowerCaseEntityTripletInStoragePath(decodedUriNoRoot);
 
       // Re-prepend the root path to the relative file path
-      const filePath = path.join(this.bucketRootPath, filePathNoRoot);
+      const filePath = path.posix.join(this.bucketRootPath, filePathNoRoot);
 
       // Files with different extensions (CSS, HTML) need to be served with different headers
       const fileExtension = path.extname(filePath);
@@ -310,7 +310,7 @@ export class GoogleGCSPublish implements PublisherBase {
         ? entityTriplet
         : lowerCaseEntityTriplet(entityTriplet);
 
-      const entityRootDir = path.join(this.bucketRootPath, entityDir);
+      const entityRootDir = path.posix.join(this.bucketRootPath, entityDir);
 
       this.storageClient
         .bucket(this.bucketName)