diff --git a/src/lib/github.ts b/src/lib/github.ts
index 8c03494..60bd691 100644
--- a/src/lib/github.ts
+++ b/src/lib/github.ts
@@ -668,10 +668,15 @@ export async function fetchCollaboratorsForYear(
   const collaboratorMap = new Map<string, CollaboratorData>();
   const collection = data.user.contributionsCollection;
 
+  // If the user doesn't have contributions
+  if (!collection) {
+    return [];
+  }
+
   // Process PR contributors
   for (const pr of collection.pullRequestContributions?.nodes ?? []) {
     // Skip if pullRequest is null (deleted PRs)
-    if (!pr.pullRequest) continue;
+    if (!pr || !pr.pullRequest) continue;
 
     if (pr.pullRequest.author && pr.pullRequest.author.login !== username) {
       const login = pr.pullRequest.author.login;