diff --git a/blossom/server.go b/blossom/server.go
index 3b27962..653756f 100644
--- a/blossom/server.go
+++ b/blossom/server.go
@@ -33,6 +33,12 @@ func New(rl *khatru.Relay, serviceURL string) *BlossomServer {
 	mux := http.NewServeMux()
 
 	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == "OPTIONS" {
+			setCors(w)
+			w.WriteHeader(http.StatusNoContent)
+			return
+		}
+
 		if r.URL.Path == "/upload" {
 			if r.Method == "PUT" {
 				setCors(w)
diff --git a/blossom/utils.go b/blossom/utils.go
index a9ec9cc..5af0d0d 100644
--- a/blossom/utils.go
+++ b/blossom/utils.go
@@ -7,8 +7,8 @@ import (
 
 func setCors(w http.ResponseWriter) {
 	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Headers", "Authorization")
-	w.Header().Set("Access-Control-Allow-Methods", "GET PUT DELETE")
+	w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type")
+	w.Header().Set("Access-Control-Allow-Methods", "GET, PUT, DELETE, OPTIONS")
 }
 
 func blossomError(w http.ResponseWriter, msg string, code int) {