diff --git a/scripts/graph/requests.ts b/scripts/graph/requests.ts
index 249d10a..e08e9e3 100644
--- a/scripts/graph/requests.ts
+++ b/scripts/graph/requests.ts
@@ -15,7 +15,7 @@ export type CommitsResponse = {
     authorByHash: string[];
     committerDateByHash: number[];
     messageByHash: string[];
-    parentsByHash: string[][];
+    parentsByHash: number[][];
 };
 
 /**
diff --git a/src/server/web/pages/graph.rs b/src/server/web/pages/graph.rs
index 99dce60..7cc6604 100644
--- a/src/server/web/pages/graph.rs
+++ b/src/server/web/pages/graph.rs
@@ -66,7 +66,7 @@ struct CommitsResponse {
     author_by_hash: Vec<String>,
     committer_date_by_hash: Vec<i64>,
     message_by_hash: Vec<String>,
-    parents_by_hash: Vec<Vec<String>>,
+    parents_by_hash: Vec<Vec<usize>>,
 }
 
 pub async fn get_graph_commits(