diff --git a/specs/altair/beacon-chain.md b/specs/altair/beacon-chain.md
index 38aea00c0..7412a8490 100644
--- a/specs/altair/beacon-chain.md
+++ b/specs/altair/beacon-chain.md
@@ -108,7 +108,7 @@ Altair is the first beacon chain hard fork. Its main features are:
 | Name | Value |
 | - | - |
 | `G2_POINT_AT_INFINITY` | `BLSSignature(b'\xc0' + b'\x00' * 95)` |
-| `PARTICIPATION_FLAG_WEIGHTS` | `[TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_FLAG_INDEX]` |
+| `PARTICIPATION_FLAG_WEIGHTS` | `[TIMELY_SOURCE_WEIGHT, TIMELY_TARGET_WEIGHT, TIMELY_HEAD_WEIGHT]` |
 
 ## Preset
 
diff --git a/specs/altair/fork.md b/specs/altair/fork.md
index b4c4e3a31..f7aa89c42 100644
--- a/specs/altair/fork.md
+++ b/specs/altair/fork.md
@@ -41,8 +41,8 @@ Note that for the pure Altair networks, we don't apply `upgrade_to_altair` since
 If `state.slot % SLOTS_PER_EPOCH == 0` and `compute_epoch_at_slot(state.slot) == ALTAIR_FORK_EPOCH`, an irregular state change is made to upgrade to Altair.
 
 The upgrade occurs after the completion of the inner loop of `process_slots` that sets `state.slot` equal to `ALTAIR_FORK_EPOCH * SLOTS_PER_EPOCH`.
-Care must be taken when transitioning through the fork boundary as implementations will need a modified state transition function that deviates from the Phase 0 spec.
-In particular, the outer `state_transition` function defined in the Phase 0 spec will not expose the precise fork slot to execute the upgrade in the presence of skipped slots at the fork boundary. Instead the logic must be within `process_slots`.
+Care must be taken when transitioning through the fork boundary as implementations will need a modified [state transition function](../phase0/beacon-chain.md#beacon-chain-state-transition-function) that deviates from the Phase 0 document.
+In particular, the outer `state_transition` function defined in the Phase 0 document will not expose the precise fork slot to execute the upgrade in the presence of skipped slots at the fork boundary. Instead the logic must be within `process_slots`.
 
 ```python
 def translate_participation(state: BeaconState, pending_attestations: Sequence[phase0.PendingAttestation]) -> None:
diff --git a/specs/sharding/beacon-chain.md b/specs/sharding/beacon-chain.md
index 65be0f40a..5522e044d 100644
--- a/specs/sharding/beacon-chain.md
+++ b/specs/sharding/beacon-chain.md
@@ -468,7 +468,9 @@ def process_block(state: BeaconState, block: BeaconBlock) -> None:
     process_randao(state, block.body)
     process_eth1_data(state, block.body)
     process_operations(state, block.body)  # [Modified in Sharding]
-    process_execution_payload(state, block.body)  # [New in Merge]
+    # Pre-merge, skip execution payload processing
+    if is_execution_enabled(state, block):
+        process_execution_payload(state, block.body.execution_payload, EXECUTION_ENGINE)  # [New in Merge]
 ```
 
 #### Operations
diff --git a/tests/core/pyspec/eth2spec/VERSION.txt b/tests/core/pyspec/eth2spec/VERSION.txt
index 4b68ba4fa..d87416ff1 100644
--- a/tests/core/pyspec/eth2spec/VERSION.txt
+++ b/tests/core/pyspec/eth2spec/VERSION.txt
@@ -1 +1 @@
-1.1.0-alpha.4
\ No newline at end of file
+1.1.0-alpha.5
\ No newline at end of file
diff --git a/tests/generators/forks/main.py b/tests/generators/forks/main.py
index a25eecec3..7be79847d 100644
--- a/tests/generators/forks/main.py
+++ b/tests/generators/forks/main.py
@@ -2,9 +2,7 @@ from typing import Iterable
 
 from eth2spec.test.helpers.constants import PHASE0, ALTAIR, MINIMAL, MAINNET
 from eth2spec.test.helpers.typing import SpecForkName, PresetBaseName
-from eth2spec.test.altair.fork import test_altair_fork_basic
-from eth2spec.test.altair.fork import test_altair_fork_random
-
+from eth2spec.test.altair.fork import test_altair_fork_basic, test_altair_fork_random
 from eth2spec.gen_helpers.gen_base import gen_runner, gen_typing
 from eth2spec.gen_helpers.gen_from_tests.gen import generate_from_tests