diff --git a/ocrd_typegroups_classifier/processor.py b/ocrd_typegroups_classifier/processor.py
index b85390d..5efba05 100644
--- a/ocrd_typegroups_classifier/processor.py
+++ b/ocrd_typegroups_classifier/processor.py
@@ -46,7 +46,7 @@ def process(self):
         assert_file_grp_cardinality(self.output_file_grp, 1)
         if 'network' not in self.parameter:
             self.parameter['network'] = resource_filename(__name__, 'models/densenet121.tgc')
-        network_file = self.parameter['network']
+        network_file = self.resolve_resource(self.parameter['network'])
         stride = self.parameter['stride']
         classifier = TypegroupsClassifier.load(network_file)
 
diff --git a/requirements.txt b/requirements.txt
index 9fa7399..0178e59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-ocrd >= 2.0.1
+ocrd >= 2.22.3
 pandas
 scikit-image
 torch >= 1.4.0