diff --git a/pyproject.toml b/pyproject.toml
index 59ef3ef..0df7a3c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ packages = [{include = "pypowsybl_grid2opbackend"}]
 
 [tool.poetry.dependencies]
 python = "^3.10"
-grid2op = "^1.9.6"
+grid2op = "^1.9.5"
 pypowsybl = "^0.23.0.dev1" # Local installation following grid2op maybe this should be removd from .toml and install by pip
 pandapower = "^2.13.1"