diff --git a/jupyterlab/run.sh b/jupyterlab/run.sh
index fb19616..f630c8b 100755
--- a/jupyterlab/run.sh
+++ b/jupyterlab/run.sh
@@ -5,10 +5,10 @@ BOLD='\033[0;1m'
 echo "$${BOLD}Installing jupyterlab!\n"
 
 # check if jupyterlab is installed
-if ! command -v jupyterlab & >/dev/null; then
+if ! command -v jupyterlab > /dev/null 2>&1; then
     # install jupyterlab
     # check if python3 pip is installed
-    if ! command -v pip3 & >/dev/null; then
+    if ! command -v pip3 > /dev/null 2>&1; then
         echo "pip3 is not installed"
         echo "Please install pip3 in your Dockerfile/VM image before running this script"
         exit 1