diff --git a/src/lib.rs b/src/lib.rs
index 2194023..52f9e3b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -693,4 +693,4 @@ impl Index<PointId> for [ZeroNode] {
 /// The parameter `M` from the paper
 ///
 /// This should become a generic argument to `Hnsw` when possible.
-const M: usize = 6;
+const M: usize = 12;