diff --git a/docker/openproblems-python-tf2.4/requirements.txt b/docker/openproblems-python-tf2.4/requirements.txt
index 2873eefabe..c77acda1ae 100644
--- a/docker/openproblems-python-tf2.4/requirements.txt
+++ b/docker/openproblems-python-tf2.4/requirements.txt
@@ -1,3 +1,4 @@
 dca==0.3.*
-keras==2.4.*
+keras==2.5.*
 tensorflow==2.4.*
+pyyaml==5.4.1  # pinned in #431