diff --git a/server/import.mjs b/server/import.mjs
index 6d5f0a6..42102cb 100644
--- a/server/import.mjs
+++ b/server/import.mjs
@@ -87,7 +87,7 @@ async function doImport (owner, repo, id) {
     if (manifest.length !== 1) {
       throw `Unexpected manifest: ${JSON.stringify(manifest)}`
     }
-    manifest[0].RepoTags = [`github-${owner}:${repo}`]
+    manifest[0].RepoTags = [`github-${owner?.toString().toLowerCase()}:${repo}`]
     fs.writeFileSync(`tmp/artifact_${artifactId}_inner/manifest.json`, JSON.stringify(manifest));
     await runProcess(id, "tar", ["-cvf", `../archive_${artifactId}.tar`, "."], `tmp/artifact_${artifactId}_inner/`)
     await runProcess(id, "docker", ["load", "-i", `tmp/archive_${artifactId}.tar`])