diff --git a/rust-pvz-genetics/src/genetics/genome.rs b/rust-pvz-genetics/src/genetics/genome.rs
index d5bc3ae..1549dcb 100644
--- a/rust-pvz-genetics/src/genetics/genome.rs
+++ b/rust-pvz-genetics/src/genetics/genome.rs
@@ -24,7 +24,7 @@ impl Genome {
 
         let mut graph = Graph::<Gene,()>::new();
         let gene_indicies = nodes.into_iter().map(|gene|{graph.add_node(gene)}).collect::<Vec<NodeIndex>>();
-        edges.into_iter().map(|(node_a,node_b)|graph.add_edge(gene_indicies[node_a], gene_indicies[node_b], ()));
+        edges.into_iter().for_each(|(node_a,node_b)|{graph.add_edge(gene_indicies[node_a], gene_indicies[node_b], ());});
 
         return Ok(Self {
             graph