diff --git a/webserver/upload.go b/webserver/upload.go
index 4464945c834ec94444fe553a553acd6b8061d42b..6ff98be89b915ba2a6e99f46ac190e5dbb7ae4bd 100644
--- a/webserver/upload.go
+++ b/webserver/upload.go
@@ -36,9 +36,9 @@ func initUpload() {
 		var fileExtension string
 		switch {
 		case contentType == "image/jpeg":
-			fileExtension = ".jpeg"
+			fileExtension = "jpg"
 		case contentType == "image/png":
-			fileExtension = ".png"
+			fileExtension = "png"
 		default:
 			c.JSON(http.StatusBadRequest, gin.H{"error": "invalid content type, only image/jpeg and image/png allowed"})
 			return