diff --git a/specs/altair/light-client/sync-protocol.md b/specs/altair/light-client/sync-protocol.md
index 39a0b3d11..ede86f852 100644
--- a/specs/altair/light-client/sync-protocol.md
+++ b/specs/altair/light-client/sync-protocol.md
@@ -47,7 +47,7 @@ Such environments include resource-constrained devices (e.g. phones for trust-mi
 and metered VMs (e.g. blockchain VMs for cross-chain bridges).
 
 This document suggests a minimal light client design for the beacon chain that
-uses sync committees introduced in [this beacon chain extension](./beacon-chain.md).
+uses sync committees introduced in [this beacon chain extension](../beacon-chain.md).
 
 Additional documents describe how the light client sync protocol can be used:
 - [Full node](./full-node.md)