diff --git a/specs/validator/0_beacon-chain-validator.md b/specs/validator/0_beacon-chain-validator.md
index 1c316e77c..1434f0e87 100644
--- a/specs/validator/0_beacon-chain-validator.md
+++ b/specs/validator/0_beacon-chain-validator.md
@@ -423,7 +423,7 @@ Where
 
 ## Phase 0 attestation subnet stability
 
-Because Phase 0 does not have shards and thus does not have Shard Committees, there is no stable backbone to the attestation subnets (`committee_index{subnet_id}_beacon_attestation`). To provide this stability, each validator must randomly select and remain subscribed to `RANDOM_SUBNETS_PER_VALIDATOR` attestation subnets. The lifetime of each random subscription must be _at least_ `EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION`.
+Because Phase 0 does not have shards and thus does not have Shard Committees, there is no stable backbone to the attestation subnets (`committee_index{subnet_id}_beacon_attestation`). To provide this stability, each validator must randomly select and remain subscribed to `RANDOM_SUBNETS_PER_VALIDATOR` attestation subnets. The lifetime of each random subscription should be a random number of epochs between `EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION` and `2 * EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION]`.
 
 ## How to avoid slashing