diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 4940d35f4..6d18d18e6 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -23,16 +23,15 @@
     - [Data structures](#data-structures)
         - [Misc dependencies](#misc-dependencies)
             - [`Fork`](#fork)
-            - [`Crosslink`](#crosslink)
-            - [`Eth1Data`](#eth1data)
+            - [`Validator`](#validator)
             - [`AttestationData`](#attestationdata)
             - [`AttestationDataAndCustodyBit`](#attestationdataandcustodybit)
             - [`IndexedAttestation`](#indexedattestation)
-            - [`DepositData`](#depositdata)
-            - [`BeaconBlockHeader`](#beaconblockheader)
-            - [`Validator`](#validator)
             - [`PendingAttestation`](#pendingattestation)
+            - [`Crosslink`](#crosslink)
+            - [`Eth1Data`](#eth1data)
             - [`HistoricalBatch`](#historicalbatch)
+            - [`DepositData`](#depositdata)
         - [Beacon operations](#beacon-operations)
             - [`ProposerSlashing`](#proposerslashing)
             - [`AttesterSlashing`](#attesterslashing)