diff --git a/text/models.py b/text/models.py
index e3841f2..e85791f 100644
--- a/text/models.py
+++ b/text/models.py
@@ -67,6 +67,7 @@ class Text(models.Model):
         elif author.endswith("."):
             author = author[:-1] + "_"
         title = self.title
+        title = re.sub('[:/]', '_', title)
         if self.version:
             title += ".%s" % self.version
         extension = os.path.splitext(self.file.path)[1].lower()