diff --git a/Jenkinsfile b/Jenkinsfile
index 26021a9..e6f7667 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -84,7 +84,10 @@
 	tasks = [
 		[
 			pre: {
-				def currentVersion = gitLastTag()
+				def currentVersion = null
+				gitAuth(env.GIT_CRED, {
+					currentVersion = gitLastTag()
+				})
 				currentBuild.displayName = "#${env.BUILD_NUMBER} ${currentVersion}"
 			},
 			run: {