diff --git a/requirements.txt b/requirements.txt
index 0180d01..0d7c5b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # ocrd includes opencv, numpy, shapely, click
 ocrd >= 2.23.3
 scikit-learn >= 0.23.2
-tensorflow >= 2.4.0
+tensorflow >= 2.4.0, <2.12.0
 imutils >= 0.5.3
 matplotlib
 setuptools >= 50