diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a3d8aca..301d317 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -59,3 +59,18 @@ jobs:
       run: |
         docker build -t tusproject/tusd:$GITHUB_SHA .
         docker push tusproject/tusd:$GITHUB_SHA
+    - name: Tag docker image with release tag
+      if: startsWith(github.ref, 'refs/tags/')
+      run: |
+        # Extract tag name: https://stackoverflow.com/a/58178121
+        TAG_NAME="${GITHUB_REF#refs/*/}"
+        docker tag tusproject/tusd:$GITHUB_SHA tusproject/tusd:$TAG_NAME
+        docker push tusproject/tusd:$TAG_NAME
+        # Create latest tag if we have no pre-release
+        if [[ $TAG_NAME =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]];
+        then
+          docker tag tusproject/tusd:$GITHUB_SHA tusproject/tusd:latest
+          docker push tusproject/tusd:latest
+        fi
+      shell: bash
+        
diff --git a/cmd/tusd/cli/flags.go b/cmd/tusd/cli/flags.go
index b80a18c..1e2c597 100644
--- a/cmd/tusd/cli/flags.go
+++ b/cmd/tusd/cli/flags.go
@@ -82,7 +82,7 @@ func ParseFlags() {
 	flag.BoolVar(&Flags.S3DisableSSL, "s3-disable-ssl", false, "Disable SSL and only use HTTP for communication with S3 (experimental and may be removed in the future)")
 	flag.IntVar(&Flags.S3ConcurrentPartUploads, "s3-concurrent-part-uploads", 10, "Number of concurrent part uploads to S3 (experimental and may be removed in the future)")
 	flag.StringVar(&Flags.GCSBucket, "gcs-bucket", "", "Use Google Cloud Storage with this bucket as storage backend (requires the GCS_SERVICE_ACCOUNT_FILE environment variable to be set)")
-	flag.StringVar(&Flags.GCSObjectPrefix, "gcs-object-prefix", "", "Prefix for GCS object names (can't contain underscore character)")
+	flag.StringVar(&Flags.GCSObjectPrefix, "gcs-object-prefix", "", "Prefix for GCS object names")
 	flag.StringVar(&Flags.AzStorage, "azure-storage", "", "Use Azure BlockBlob Storage with this container name as a storage backend (requires the AZURE_ACCOUNT_NAME and AZURE_ACCOUNT_KEY environment variable to be set)")
 	flag.StringVar(&Flags.AzContainerAccessType, "azure-container-access-type", "", "Access type when creating a new container if it does not exist (possible values: blob, container, '')")
 	flag.StringVar(&Flags.AzBlobAccessTier, "azure-blob-access-tier", "", "Blob access tier when uploading new files (possible values: archive, cool, hot, '')")
diff --git a/pkg/gcsstore/gcsservice.go b/pkg/gcsstore/gcsservice.go
index 4667622..3acbcbd 100644
--- a/pkg/gcsstore/gcsservice.go
+++ b/pkg/gcsstore/gcsservice.go
@@ -351,7 +351,11 @@ loop:
 		if strings.HasSuffix(objAttrs.Name, "info") {
 			continue
 		}
-		split := strings.Split(objAttrs.Name, "_")
+
+		fileNameParts := strings.Split(objAttrs.Name, "/")
+		fileName := fileNameParts[len(fileNameParts)-1]
+
+		split := strings.Split(fileName, "_")
 
 		// If the object name does not split on "_", we have a composed object.
 		// If the object name splits on "_" in to four pieces we
diff --git a/pkg/gcsstore/gcsservice_test.go b/pkg/gcsstore/gcsservice_test.go
index eeffe15..2c91430 100644
--- a/pkg/gcsstore/gcsservice_test.go
+++ b/pkg/gcsstore/gcsservice_test.go
@@ -447,7 +447,7 @@ func TestFilterObject(t *testing.T) {
 	defer gock.Off()
 
 	resp := googleBucketResponse{[]googleObjectResponse{
-		googleObjectResponse{Name: "test-prefix_1"},
+		googleObjectResponse{Name: "test_directory/test-prefix_1"},
 	}}
 
 	gock.New("https://www.googleapis.com").
diff --git a/pkg/handler/head_test.go b/pkg/handler/head_test.go
index 59da085..b5c83bb 100644
--- a/pkg/handler/head_test.go
+++ b/pkg/handler/head_test.go
@@ -48,9 +48,10 @@ func TestHead(t *testing.T) {
 			},
 			Code: http.StatusOK,
 			ResHeader: map[string]string{
-				"Upload-Offset": "11",
-				"Upload-Length": "44",
-				"Cache-Control": "no-store",
+				"Upload-Offset":  "11",
+				"Upload-Length":  "44",
+				"Content-Length": "44",
+				"Cache-Control":  "no-store",
 			},
 		}).Run(handler, t)
 
diff --git a/pkg/handler/unrouted_handler.go b/pkg/handler/unrouted_handler.go
index ba2fb42..6c5f52b 100644
--- a/pkg/handler/unrouted_handler.go
+++ b/pkg/handler/unrouted_handler.go
@@ -260,9 +260,9 @@ func (handler *UnroutedHandler) Middleware(h http.Handler) http.Handler {
 		}
 
 		// Test if the version sent by the client is supported
-		// GET methods are not checked since a browser may visit this URL and does
-		// not include this header. This request is not part of the specification.
-		if r.Method != "GET" && r.Header.Get("Tus-Resumable") != "1.0.0" {
+		// GET and HEAD methods are not checked since a browser may visit this URL and does
+		// not include this header. GET requests are not part of the specification.
+		if r.Method != "GET" && r.Method != "HEAD" && r.Header.Get("Tus-Resumable") != "1.0.0" {
 			handler.sendError(w, r, ErrUnsupportedVersion)
 			return
 		}
@@ -472,6 +472,7 @@ func (handler *UnroutedHandler) HeadFile(w http.ResponseWriter, r *http.Request)
 		w.Header().Set("Upload-Defer-Length", UploadLengthDeferred)
 	} else {
 		w.Header().Set("Upload-Length", strconv.FormatInt(info.Size, 10))
+		w.Header().Set("Content-Length", strconv.FormatInt(info.Size, 10))
 	}
 
 	w.Header().Set("Cache-Control", "no-store")