diff --git a/qurator/dinglehopper/ocrd_cli.py b/qurator/dinglehopper/ocrd_cli.py
index 2a5aed5..ee44e2f 100644
--- a/qurator/dinglehopper/ocrd_cli.py
+++ b/qurator/dinglehopper/ocrd_cli.py
@@ -8,6 +8,7 @@ from ocrd_utils import concat_padded, getLogger
 from pkg_resources import resource_string
 
 from qurator.dinglehopper.cli import process as cli_process
+from qurator.dinglehopper.edit_distance import _levenshtein_matrix
 
 log = getLogger('processor.OcrdDinglehopperEvaluate')
 
@@ -62,6 +63,9 @@ class OcrdDinglehopperEvaluate(Processor):
                      mimetype=mimetype,
                      local_filename=report_prefix + report_suffix)
 
+            # Clear cache between files
+            _levenshtein_matrix.cache_clear()
+
 
 if __name__ == '__main__':
     ocrd_dinglehopper()