diff --git a/monkey/monkey_island/linux/install_mongo.sh b/monkey/monkey_island/linux/install_mongo.sh
index 0aaacc490..0d720fe15 100755
--- a/monkey/monkey_island/linux/install_mongo.sh
+++ b/monkey/monkey_island/linux/install_mongo.sh
@@ -25,16 +25,17 @@ else
 fi
 
 TEMP_MONGO=$(mktemp -d)
-pushd ${TEMP_MONGO}
+pushd "${TEMP_MONGO}"
 wget ${tgz_url} -O mongodb.tgz
 tar -xf mongodb.tgz
 popd
 
-mkdir -p ${MONGODB_DIR}/bin
-mkdir -p ${MONGODB_DIR}/db
-cp ${TEMP_MONGO}/mongodb-*/bin/mongod ${MONGODB_DIR}/bin/mongod
-cp ${TEMP_MONGO}/mongodb-*/LICENSE-Community.txt ${MONGODB_DIR}/
-chmod a+x ${MONGODB_DIR}/bin/mongod
+mkdir -p "${MONGODB_DIR}"/bin
+mkdir -p "${MONGODB_DIR}"/db
+cp "${TEMP_MONGO}"/mongodb-*/bin/mongod "${MONGODB_DIR}"/bin/mongod
+cp "${TEMP_MONGO}"/mongodb-*/LICENSE-Community.txt "${MONGODB_DIR}"/
+chmod a+x "${MONGODB_DIR}"/bin/mongod
+# shellcheck disable=SC2086
 rm -r ${TEMP_MONGO}
 
 exit 0
\ No newline at end of file