diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 0c9f49b74..647d1c9bd 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -251,11 +251,11 @@ The following values are (non-configurable) constants used throughout the specif
 
 | Name | Value |
 | - | - |
-| `DOMAIN_BEACON_PROPOSER` | `Bytes4('0x00000000')` |
-| `DOMAIN_BEACON_ATTESTER` | `Bytes4('0x01000000')` |
-| `DOMAIN_RANDAO` | `Bytes4('0x02000000')` |
-| `DOMAIN_DEPOSIT` | `Bytes4('0x03000000')` |
-| `DOMAIN_VOLUNTARY_EXIT` | `Bytes4('0x04000000')` |
+| `DOMAIN_BEACON_PROPOSER` | `DomainType('0x00000000')` |
+| `DOMAIN_BEACON_ATTESTER` | `DomainType('0x01000000')` |
+| `DOMAIN_RANDAO` | `DomainType('0x02000000')` |
+| `DOMAIN_DEPOSIT` | `DomainType('0x03000000')` |
+| `DOMAIN_VOLUNTARY_EXIT` | `DomainType('0x04000000')` |
 
 ## Containers
 
diff --git a/specs/core/1_custody-game.md b/specs/core/1_custody-game.md
index 829c68ac1..b1f61de2f 100644
--- a/specs/core/1_custody-game.md
+++ b/specs/core/1_custody-game.md
@@ -131,7 +131,7 @@ The following types are defined, mapping into `DomainType` (little endian):
 
 | Name | Value |
 | - | - |
-| `DOMAIN_CUSTODY_BIT_CHALLENGE` | `Bytes4('0x06000000')` |
+| `DOMAIN_CUSTODY_BIT_CHALLENGE` | `DomainType('0x06000000')` |
 
 ### TODO PLACEHOLDER
 
diff --git a/specs/core/1_shard-data-chains.md b/specs/core/1_shard-data-chains.md
index 408c9b2a8..93570dbee 100644
--- a/specs/core/1_shard-data-chains.md
+++ b/specs/core/1_shard-data-chains.md
@@ -101,8 +101,8 @@ This document describes the shard transition function (data layer only) and the
 
 | Name | Value |
 | - | - |
-| `DOMAIN_SHARD_PROPOSER` | `Bytes4('0x80000000')` |
-| `DOMAIN_SHARD_ATTESTER` | `Bytes4('0x81000000')` |
+| `DOMAIN_SHARD_PROPOSER` | `DomainType('0x80000000')` |
+| `DOMAIN_SHARD_ATTESTER` | `DomainType('0x81000000')` |
 
 ## Containers