diff --git a/utils/helm/speckle-server/templates/preview_service/deployment.yml b/utils/helm/speckle-server/templates/preview_service/deployment.yml
index 76adcf4c2..e5c3d82d6 100644
--- a/utils/helm/speckle-server/templates/preview_service/deployment.yml
+++ b/utils/helm/speckle-server/templates/preview_service/deployment.yml
@@ -35,7 +35,7 @@ spec:
             command:
               - node
               - -e
-              - {{ printf "process.exit(Date.now() - require('fs').readFileSync('/tmp/last_successful_query', 'utf8') > %d)" .Values.preview_service.puppeteer.timeoutMilliseconds }}
+              - {{ printf "process.exit(Date.now() - require('fs').readFileSync('/tmp/last_successful_query', 'utf8') > %s)" .Values.preview_service.puppeteer.timeoutMilliseconds }}
 
         resources:
           requests: