diff --git a/pylfire/requirements.txt b/pylfire/requirements.txt
index f336c1a..050b368 100644
--- a/pylfire/requirements.txt
+++ b/pylfire/requirements.txt
@@ -2,4 +2,4 @@ elfi==0.7.4
 graphviz==0.13
 glmnet==2.1.1
 flake8==3.7.8
-pytest==5.1.2
+pytest==9.0.3