diff --git a/beacon_chain/consensus_object_pools/blockchain_dag.nim b/beacon_chain/consensus_object_pools/blockchain_dag.nim
index 0c7243859..3eac8dc1e 100644
--- a/beacon_chain/consensus_object_pools/blockchain_dag.nim
+++ b/beacon_chain/consensus_object_pools/blockchain_dag.nim
@@ -1498,7 +1498,7 @@ proc pruneBlocksDAG(dag: ChainDAGRef) =
     prunedHeads = hlen - dag.heads.len,
     dagPruneDur = Moment.now() - startTick
 
-# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/sync/optimistic.md#helpers
+# https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.3/sync/optimistic.md#helpers
 template is_optimistic*(dag: ChainDAGRef, root: Eth2Digest): bool =
   root in dag.optimisticRoots
 
@@ -1508,15 +1508,15 @@ proc markBlockInvalid*(dag: ChainDAGRef, root: Eth2Digest) =
   logScope: blck = shortLog(blck)
 
   if not dag.is_optimistic(root):
-    # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/sync/optimistic.md#transitioning-from-valid---invalidated-or-invalidated---valid
-    # "It is outside of the scope of the specification since it's only possible
-    # with a faulty EE. Such a scenario requires manual intervention."
+    # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.3/sync/optimistic.md#transitioning-from-valid---invalidated-or-invalidated---valid
+    # "These operations are purposefully omitted. It is outside of the scope of
+    # the specification since it's only possible with a faulty EE."
     warn "markBlockInvalid: attempt to invalidate valid block"
     doAssert strictVerification notin dag.updateFlags
     return
 
   if root == dag.finalizedHead.blck.root:
-    # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/sync/optimistic.md#re-orgs
+    # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.3/sync/optimistic.md#re-orgs
     # "If the justified checkpoint transitions from `NOT_VALIDATED` ->
     # `INVALIDATED`, a consensus engine MAY choose to alert the user and force
     # the application to exit."
diff --git a/beacon_chain/fork_choice/fork_choice_types.nim b/beacon_chain/fork_choice/fork_choice_types.nim
index 75a887734..34dcd6a06 100644
--- a/beacon_chain/fork_choice/fork_choice_types.nim
+++ b/beacon_chain/fork_choice/fork_choice_types.nim
@@ -88,8 +88,7 @@ type
   ProtoNodes* = object
     buf*: seq[ProtoNode]
     offset*: int ##\
-    ## Substracted from logical Index
-    ## to get the physical index
+    ## Subtracted from logical index to get the physical index
 
   ProtoArray* = object
     hasLowParticipation*: bool