diff --git a/testdata/requirements.txt b/testdata/requirements.txt
index 355ce61..42e7dd0 100644
--- a/testdata/requirements.txt
+++ b/testdata/requirements.txt
@@ -1,5 +1,5 @@
 xgboost==1.6.0
 scikit-learn==1.4.0
-treelite==3.9.1
+treelite==4.0.0
 treelite-runtime==3.9.1
 pandas==2.2.0