diff --git a/installer/install.bash b/installer/install.bash
index faa5fa6..f7a94a4 100755
--- a/installer/install.bash
+++ b/installer/install.bash
@@ -44,6 +44,6 @@ function install_miniconda {
 
 HUB_CONDA_DIR=${TLJH_INSTALL_PREFIX}/hub
 install_miniconda ${HUB_CONDA_DIR}
-${HUB_CONDA_DIR}/bin/pip install ${TLJH_INSTALL_PIP_FLAGS} ${TLJH_INSTALL_PIP_SPEC}
+${HUB_CONDA_DIR}/bin/pip install --upgrade ${TLJH_INSTALL_PIP_FLAGS} ${TLJH_INSTALL_PIP_SPEC}
 
 ${HUB_CONDA_DIR}/bin/python3 -m tljh.installer