diff --git a/scripts/gitlab-to-pentext.py b/scripts/gitlab-to-pentext.py
index 63ceb47..5536f62 100644
--- a/scripts/gitlab-to-pentext.py
+++ b/scripts/gitlab-to-pentext.py
@@ -244,7 +244,7 @@ def valid_filename(filename):
     """
     valid_filename = ''
     for char in filename.strip():
-        if char in [':', '/', '.', '\\', ' ', '[', ']', '(', ')']:
+        if char in [':', '/', '.', '\\', ' ', '[', ']', '(', ')', '\'']:
             if len(char) and valid_filename[-1] != '-':
                 valid_filename += '-'
         else: