diff --git a/eth2/types/src/crosslink.rs b/eth2/types/src/crosslink.rs
index dfa0311eff..f91680c756 100644
--- a/eth2/types/src/crosslink.rs
+++ b/eth2/types/src/crosslink.rs
@@ -7,7 +7,7 @@ use test_random_derive::TestRandom;
 
 /// Specifies the block hash for a shard at an epoch.
 ///
-/// Spec v0.4.0
+/// Spec v0.5.0
 #[derive(
     Debug,
     Clone,
diff --git a/eth2/types/src/eth1_data.rs b/eth2/types/src/eth1_data.rs
index 0f1dbfec59..deced19fb6 100644
--- a/eth2/types/src/eth1_data.rs
+++ b/eth2/types/src/eth1_data.rs
@@ -7,7 +7,7 @@ use test_random_derive::TestRandom;
 
 /// Contains data obtained from the Eth1 chain.
 ///
-/// Spec v0.4.0
+/// Spec v0.5.0
 #[derive(
     Debug, PartialEq, Clone, Default, Serialize, Deserialize, Encode, Decode, TreeHash, TestRandom,
 )]
diff --git a/eth2/types/src/eth1_data_vote.rs b/eth2/types/src/eth1_data_vote.rs
index d709608d5f..2f3a1ade1a 100644
--- a/eth2/types/src/eth1_data_vote.rs
+++ b/eth2/types/src/eth1_data_vote.rs
@@ -7,7 +7,7 @@ use test_random_derive::TestRandom;
 
 /// A summation of votes for some `Eth1Data`.
 ///
-/// Spec v0.4.0
+/// Spec v0.5.0
 #[derive(
     Debug, PartialEq, Clone, Default, Serialize, Deserialize, Encode, Decode, TreeHash, TestRandom,
 )]