diff --git a/xls2xlsx/htmlxls2xlsx.py b/xls2xlsx/htmlxls2xlsx.py
index 42b0bb7..ea3fa54 100644
--- a/xls2xlsx/htmlxls2xlsx.py
+++ b/xls2xlsx/htmlxls2xlsx.py
@@ -21,6 +21,7 @@
 import logging
 import email            # For mht files
 import shutil
+import tempfile
 from functools import lru_cache
 from dateutil.parser import parse as date_parse
 from datetime import datetime, date, timedelta
@@ -49,7 +50,7 @@ def __init__(self):
         self.skinny_chars = "1!|iIl.,;:' "
         self.upper_chars = "ABCDEFGHJKLMNOPQRSTUVXYZmw()[]$&*-+{}<>/?"
         self.fat_chars = 'MW@#%_'
-        fontnames_file = os.path.join(os.path.dirname(__file__), 'fontnames.yaml')
+        fontnames_file = tempfile.gettempdir() + '/fontnames.yaml'
         self.name_to_path = {}
         if os.path.isfile(fontnames_file):
             with open(fontnames_file, 'r') as fn: