diff --git a/sorteerhoed/central_management.py b/sorteerhoed/central_management.py
index bd93cac..85ca129 100644
--- a/sorteerhoed/central_management.py
+++ b/sorteerhoed/central_management.py
@@ -304,7 +304,7 @@ class CentralManagement():
         
         cmd = [
             'sudo', 'scanimage', '-d', 'epkowa', '--format', 'jpeg',
-            '--resolution=100', '-l','20','-t','30','-x',(self.config['scanner']['height']),
+            '--resolution=100', '-l','20','-t','30','-x',str(self.config['scanner']['height']),
             '-y',str(self.config['scanner']['width'])
         ]
         filename = self.currentHit.getImagePath()