diff --git a/jobserver/github.py b/jobserver/github.py
index dfebbde7a..13656399a 100644
--- a/jobserver/github.py
+++ b/jobserver/github.py
@@ -664,7 +664,7 @@ def get_repos_with_dates(self, org):
 
             topics = []
             if repo["repositoryTopics"]["nodes"]:
-                topics = [n["topic"]["name"] for n in repo["repositoryTopics"]["nodes"]]
+                topics = [n["topic"]["name"] for n in repo["repositoryTopics"]["nodes"] if n is not None]
 
             yield {
                 "name": repo["name"],