diff --git a/consensus/types/src/eth_spec.rs b/consensus/types/src/eth_spec.rs
index 41c6a88d6..e2accf3df 100644
--- a/consensus/types/src/eth_spec.rs
+++ b/consensus/types/src/eth_spec.rs
@@ -298,7 +298,7 @@ impl EthSpec for MainnetEthSpec {
     type GasLimitDenominator = U1024;
     type MinGasLimit = U5000;
     type MaxExtraDataBytes = U32;
-    type MaxBlobsPerBlock = U16; // 2**4 = 16
+    type MaxBlobsPerBlock = U4;
     type BytesPerFieldElement = U32;
     type FieldElementsPerBlob = U4096;
     type BytesPerBlob = U131072;
@@ -404,7 +404,7 @@ impl EthSpec for GnosisEthSpec {
     type SlotsPerEth1VotingPeriod = U1024; // 64 epochs * 16 slots per epoch
     type MaxBlsToExecutionChanges = U16;
     type MaxWithdrawalsPerPayload = U16;
-    type MaxBlobsPerBlock = U16; // 2**4 = 16
+    type MaxBlobsPerBlock = U4;
     type FieldElementsPerBlob = U4096;
     type BytesPerFieldElement = U32;
     type BytesPerBlob = U131072;