diff --git a/requirements.txt b/requirements.txt
index d3494e153..d91e4370b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ grpcio<=1.59.3 # 1.60.0 has broken L0_ssl_grpc. The client gets corrupted and ca
 httplib2>=0.19.0
 matplotlib>=3.3.4
 numba>=0.51.2
-optuna>=3.6.1
+optuna==3.6.1
 pdfkit>=0.6.1
 prometheus_client>=0.9.0
 protobuf