diff --git a/cps/embed_helper.py b/cps/embed_helper.py
index 71de216d..54db47ef 100644
--- a/cps/embed_helper.py
+++ b/cps/embed_helper.py
@@ -28,7 +28,7 @@ log = logger.create()
 
 def do_calibre_export(book_id, book_format):
     try:
-        quotes = [3, 5, 7, 9]
+        quotes = [4, 6]
         tmp_dir = get_temp_dir()
         calibredb_binarypath = get_calibre_binarypath("calibredb")
         temp_file_name = str(uuid4())
diff --git a/cps/tasks/convert.py b/cps/tasks/convert.py
index e6af356f..3bef81a9 100644
--- a/cps/tasks/convert.py
+++ b/cps/tasks/convert.py
@@ -255,7 +255,7 @@ class TaskConvert(CalibreTask):
         try:
             # path_tmp_opf = self._embed_metadata()
             if config.config_embed_metadata:
-                quotes = [3, 5]
+                quotes = [5]
                 tmp_dir = get_temp_dir()
                 calibredb_binarypath = os.path.join(config.config_binariesdir, SUPPORTED_CALIBRE_BINARIES["calibredb"])
                 my_env = os.environ.copy()