diff --git a/templates/index.html b/templates/index.html
index 32e05ea..66fe666 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -36,6 +36,8 @@
             },
             methods: {
                 timestampToDate: function (timestamp) {
+                    if (timestamp === null) return "";
+
                     return new Date(timestamp * 1000).toLocaleString()
                 }
             }
diff --git a/templates/job.html b/templates/job.html
index 0d2e021..6ba98a2 100644
--- a/templates/job.html
+++ b/templates/job.html
@@ -38,6 +38,8 @@
             },
             methods: {
                 timestampToDate: function (timestamp) {
+                    if (timestamp === null) return "";
+
                     return new Date(timestamp * 1000).toLocaleString()
                 },
                 cancelJob: function() {