diff --git a/requirements.txt b/requirements.txt
index 0d7c5b2..a19a191 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 # ocrd includes opencv, numpy, shapely, click
 ocrd >= 2.23.3
+numpy <1.24.0
 scikit-learn >= 0.23.2
 tensorflow >= 2.4.0, <2.12.0
 imutils >= 0.5.3