diff --git a/tools/wheels/upload_wheels.sh b/tools/wheels/upload_wheels.sh
index eef3938755e..5e2dc92ee0b 100644
--- a/tools/wheels/upload_wheels.sh
+++ b/tools/wheels/upload_wheels.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 set_travis_vars() {
     # Set env vars
     echo "TRAVIS_EVENT_TYPE is $TRAVIS_EVENT_TYPE"
@@ -13,7 +15,7 @@ set_travis_vars() {
     else
       IS_PUSH="false"
     fi
-    if [[ "$TRAVIS_EVENT_TYPE" == "cron"  || -v CIRRUS_CRON ]]; then
+    if [[ "$TRAVIS_EVENT_TYPE" == "cron"  || -v "$CIRRUS_CRON" ]]; then
       IS_SCHEDULE_DISPATCH="true"
     elif [[ "$TRAVIS_EVENT_TYPE" == "api"  || "$CIRRUS_API_CREATED" == "true" ]]; then
       # Manual CI run, so upload
@@ -41,9 +43,9 @@ set_upload_vars() {
     fi
 }
 upload_wheels() {
-    echo ${PWD}
+    echo "${PWD}"
     if [[ ${ANACONDA_UPLOAD} == true ]]; then
-        if [ -z ${TOKEN} ]; then
+        if [ -z "${TOKEN}" ]; then
             echo no token set, not uploading
         else
             python -m pip install \
@@ -51,10 +53,10 @@ upload_wheels() {
             # sdists are located under dist folder when built through setup.py
             if compgen -G "./dist/*.gz"; then
                 echo "Found sdist"
-                anaconda -q -t ${TOKEN} upload --skip -u ${ANACONDA_ORG} ./dist/*.gz
+                anaconda -q -t "${TOKEN}" upload --skip -u "${ANACONDA_ORG}" ./dist/*.gz
             elif compgen -G "./wheelhouse/*.whl"; then
                 echo "Found wheel"
-                anaconda -q -t ${TOKEN} upload --skip -u ${ANACONDA_ORG} ./wheelhouse/*.whl
+                anaconda -q -t "${TOKEN}" upload --skip -u "${ANACONDA_ORG}" ./wheelhouse/*.whl
             else
                 echo "Files do not exist"
                 return 1