diff --git a/pkg/routes/storage.go b/pkg/routes/storage.go
index b0e108e3e..ec1d73157 100644
--- a/pkg/routes/storage.go
+++ b/pkg/routes/storage.go
@@ -8,6 +8,7 @@ import (
 	"io"
 	"net/http"
 	url2 "net/url"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -420,12 +421,24 @@ func GetUpdateTransactionRepoFile(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	logger.WithFields(log.Fields{
-		"orgID":               updateRepo.OrgID,
-		"updateTransactionID": updateRepo.ID,
-		"path":                requestPath,
-	}).Debug("return storage update transaction repo resource content")
-	serveStorageContent(w, r, requestPath)
+	// workaround to serve 303 instead of 404 for optional ostree files
+	baseFilename := filepath.Base(requestPath)
+	switch baseFilename {
+	case "summary", "summary.sig", ".commitmeta", "superblock":
+		logger.WithFields(log.Fields{
+			"orgID":               updateRepo.OrgID,
+			"updateTransactionID": updateRepo.ID,
+			"path":                requestPath,
+		}).Debug("redirected possible missing optional ostree file")
+		redirectToStorageSignedURL(w, r, requestPath)
+	default:
+		logger.WithFields(log.Fields{
+			"orgID":               updateRepo.OrgID,
+			"updateTransactionID": updateRepo.ID,
+			"path":                requestPath,
+		}).Debug("return storage update transaction repo resource content")
+		serveStorageContent(w, r, requestPath)
+	}
 }
 
 // storageImageCtx is a handler for storage image requests
diff --git a/pkg/routes/storage_test.go b/pkg/routes/storage_test.go
index 961208329..7891495a6 100644
--- a/pkg/routes/storage_test.go
+++ b/pkg/routes/storage_test.go
@@ -138,7 +138,7 @@ var _ = Describe("Storage Router", func() {
 
 		Context("GetUpdateTransactionRepoFile", func() {
 			It("Should return the requested resource content", func() {
-				targetRepoFile := "summary.sig"
+				targetRepoFile := "thing.filez"
 				req, err := http.NewRequest("GET", fmt.Sprintf("/storage/update-repos/%d/%s", updateTransaction.ID, targetRepoFile), nil)
 				Expect(err).ToNot(HaveOccurred())
 
@@ -161,6 +161,24 @@ var _ = Describe("Storage Router", func() {
 				Expect(string(respBody)).To(Equal(fileContent))
 			})
 
+			It("Should redirect to the requested resource content file", func() {
+				targetRepoFile := "summary.sig"
+				req, err := http.NewRequest("GET", fmt.Sprintf("/storage/update-repos/%d/content/%s", updateTransaction.ID, targetRepoFile), nil)
+				Expect(err).ToNot(HaveOccurred())
+
+				url, err := url2.Parse(updateTransaction.Repo.URL)
+				Expect(err).ToNot(HaveOccurred())
+				targetPath := fmt.Sprintf("%s/%s", url.Path, targetRepoFile)
+				expectedURL := fmt.Sprintf("%s/%s?signature", url, targetRepoFile)
+				mockFilesService.EXPECT().GetSignedURL(targetPath).Return(expectedURL, nil)
+
+				httpTestRecorder := httptest.NewRecorder()
+				router.ServeHTTP(httpTestRecorder, req)
+
+				Expect(httpTestRecorder.Code).To(Equal(http.StatusSeeOther))
+				Expect(httpTestRecorder.Header()["Location"][0]).To(Equal(expectedURL))
+			})
+
 			It("should return error when the update transaction does not exists", func() {
 
 				req, err := http.NewRequest("GET", fmt.Sprintf("/storage/update-repos/%d/summary.sig", 9999), nil)