diff --git a/backend/app/store/image/image.go b/backend/app/store/image/image.go
index 2a3554a3..ee9151fa 100644
--- a/backend/app/store/image/image.go
+++ b/backend/app/store/image/image.go
@@ -132,7 +132,7 @@ func (s *Service) Close() {
 // check if file f is a valid image format, i.e. gif, png or jpeg
 func isValidImage(b []byte) bool {
 	ct := http.DetectContentType(b)
-	return ct == "image/gif" || ct == "image/png" || ct == "image/jpeg"
+	return ct == "image/gif" || ct == "image/png" || ct == "image/jpeg" || ct == "image/webp"
 }
 
 // guid makes a globally unique id