diff --git a/requirements.txt b/requirements.txt
index 9d06ef1..c9e38b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,9 @@
 numpy
 torch
 tqdm
-lightgbm
+lightgbm~=3.3.5
 gpytorch
 scikit-learn
 scikit-optimize
 botorch
-torchvision
\ No newline at end of file
+torchvision