diff --git a/korektury/models.py b/korektury/models.py
index 2ede1f7e..ff0ba62f 100644
--- a/korektury/models.py
+++ b/korektury/models.py
@@ -10,10 +10,14 @@ from django.core.exceptions import ObjectDoesNotExist
 import subprocess
 from reversion import revisions as reversion
 
+from unidecode import unidecode
+
 
 # PrilohaReseni method
 def generate_filename(self, filename):
-    clean = filename.replace('/','-').replace('\0', '').replace(":","_")
+    clean = unidecode(
+        filename.replace('/', '-').replace('\0', '').replace(":", "_")
+    )
     fname = "%s_%s" % (
         timezone.now().strftime('%Y-%m-%d-%H_%M'),
         clean)
diff --git a/requirements.txt b/requirements.txt
index 77d913ea..c2d0b32b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ pytz==2015.7
 six==1.10.0
 pexpect==4.0.1
 traitlets==4.0.0
+Unidecode==0.4.19
 
 # Django and modules