diff --git a/vars/draftset.groovy b/vars/draftset.groovy
index f579354..f8df188 100644
--- a/vars/draftset.groovy
+++ b/vars/draftset.groovy
@@ -12,7 +12,7 @@
     def api = new DraftsetsApi()
     api.basePath = "https://production-drafter-ons-alpha.publishmydata.com"
     api.versionPath = "/v1"
-    api.auth = "Basic " + System.getenv("PMD_API").bytes.encodeBase64()
+    api.auth = "Basic ${env.PMD_API.bytes.encodeBase64()}"
     def ds = null
     api.draftsetsGet(null, { result -> ds = result },
             { status, reason -> throw new Exception(reason) })