diff --git a/src/NzbDrone.Core/Blocklisting/BlocklistService.cs b/src/NzbDrone.Core/Blocklisting/BlocklistService.cs
index cbea38f6b..c10a745e9 100644
--- a/src/NzbDrone.Core/Blocklisting/BlocklistService.cs
+++ b/src/NzbDrone.Core/Blocklisting/BlocklistService.cs
@@ -132,7 +132,7 @@ namespace NzbDrone.Core.Blocklisting
                 SourceTitle = message.SourceTitle,
                 Quality = message.Quality,
                 Date = DateTime.UtcNow,
-                PublishedDate = DateTime.Parse(message.Data.GetValueOrDefault("publishedDate")),
+                PublishedDate = DateTime.TryParse(message.Data.GetValueOrDefault("publishedDate"), out var publishedDate) ? publishedDate : null,
                 Size = long.Parse(message.Data.GetValueOrDefault("size", "0")),
                 Indexer = message.Data.GetValueOrDefault("indexer"),
                 Protocol = (DownloadProtocol)Convert.ToInt32(message.Data.GetValueOrDefault("protocol")),