diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 0c564bc5f..ea180fe24 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -159,7 +159,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
 | Name | Value | Unit |
 | - | - | :-: |
 | `SHARD_COUNT` | `2**10` (= 1,024) | shards |
-| `TARGET_COMMITTEE_SIZE` | `2**8` (= 256) | [validators](#dfn-validator) |
+| `TARGET_COMMITTEE_SIZE` | `2**7` (= 128) | [validators](#dfn-validator) |
 | `EJECTION_BALANCE` | `2**4` (= 16) | ETH |
 | `MAX_BALANCE_CHURN_QUOTIENT` | `2**5` (= 32) | - |
 | `GWEI_PER_ETH` | `10**9` | Gwei/ETH |
@@ -170,7 +170,7 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
 | `LATEST_RANDAO_MIXES_LENGTH` | `2**13` (= 8,192) | randao mixes |
 | `EMPTY_SIGNATURE` | `[bytes48(0), bytes48(0)]` | - |
 
-* For the safety of crosslinks a minimum committee size of 111 is [recommended](https://vitalik.ca/files/Ithaca201807_Sharding.pdf). (Unbiasable randomness with a Verifiable Delay Function (VDF) will improve committee robustness and lower the safe minimum committee size.) The shuffling algorithm generally ensures (assuming sufficient validators) committee sizes at least `TARGET_COMMITTEE_SIZE // 2`.
+* For the safety of crosslinks `TARGET_COMMITTEE_SIZE` exceeds [the recommended minimum committee size of 111](https://vitalik.ca/files/Ithaca201807_Sharding.pdf); with sufficient active validators (at least `EPOCH_LENGTH * TARGET_COMMITTEE_SIZE`), the shuffling algorithm ensures committee sizes at least `TARGET_COMMITTEE_SIZE`. (Unbiasable randomness with a Verifiable Delay Function (VDF) will improve committee robustness and lower the safe minimum committee size.)
 
 ### Deposit contract