diff --git a/.drone.yml b/.drone.yml
index dc0a408..9bf9e82 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -20,7 +20,7 @@ steps:
   - set -x
   - |
     terraform -chdir=terraform plan \
-      -var='vsphere_password=$${VSPHERE_PASSWORD}' -var='repo_username=$${REPO_USERNAME}' -var='repo_password=$${REPO_PASSWORD}' \
+      -var="vsphere_password=$${VSPHERE_PASSWORD}" -var="repo_username=$${REPO_USERNAME}" -var="repo_password=$${REPO_PASSWORD}" \
       -var-file='vsphere.tfvars' \
       -input=false \
       -out=terraform.plan