diff --git a/scripts/upgrade b/scripts/upgrade
index 8797ffe..2b0e323 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -42,7 +42,7 @@ chown -R $app: "$install_dir"
 
 pushd $install_dir
 	mkdir -p .venv
-	PIPENV_VENV_IN_PROJECT="enabled" PIPENV_SKIP_LOCK=true ynh_exec_warn_less python3 -m pipenv install -U fittrackee==$fittrackee_version python-dotenv
+	PIPENV_VENV_IN_PROJECT="enabled" PIPENV_SKIP_LOCK=true ynh_exec_warn_less python3 -m pipenv install fittrackee==$fittrackee_version python-dotenv
 popd
 
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