diff --git a/scripts/build.sh b/scripts/build.sh
index e11ef9e..fa1ab20 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -3,7 +3,7 @@
 # Check if necessary packages are installed
 necessary_packages=("pdflatex")
 
-for package in ${necessary_packages}; do
+for package in "${necessary_packages}"; do
     if ! [dpkg -l "${package}" > /dev/null 2>&1]; then
         echo "Error: ${package} is not installed."
         exit 1