diff --git a/helm-chart-collator/Dockerfile b/helm-chart-collator/Dockerfile
index 4d070e4..ad3d004 100644
--- a/helm-chart-collator/Dockerfile
+++ b/helm-chart-collator/Dockerfile
@@ -30,7 +30,7 @@ COPY config /opt/config
 ARG CHARTS="/opt/config/charts.yaml"
 RUN ansible-playbook -v /opt/playbooks/create_repository.yaml \
   -i /opt/playbooks/inventory.yaml \
-  --extra-vars "CHARTS=$CHARTS"
+  --extra-vars "CHARTS='$CHARTS'"
 
 FROM chartmuseum/chartmuseum:latest