diff --git a/requirements.txt b/requirements.txt
index a485d89..263f5b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # ocrd includes opencv, numpy, shapely, click
-ocrd >= 2.23.3
+ocrd >= 2.63.3
 numpy <1.24.0
 scikit-learn >= 0.23.2
 tensorflow <2.16.0 # TF 2.16 or greater pulls incompatible Keras 3