diff --git a/setup.py b/setup.py
index 66a1b7cfe..2b6d0cd83 100644
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,7 @@ from distutils import dir_util
 from distutils.util import convert_path
 import os
 import re
+import string
 from typing import Dict, NamedTuple, List, Sequence
 from abc import ABC, abstractmethod
 
@@ -109,10 +110,10 @@ def get_spec(file_name: str) -> SpecObject:
                         if '`' in row[i]:
                             row[i] = row[i][:row[i].find('`')]
                     is_constant_def = True
-                    if row[0][0] not in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_':
+                    if row[0][0] not in string.ascii_uppercase + '_':
                         is_constant_def = False
                     for c in row[0]:
-                        if c not in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_0123456789':
+                        if c not in string.ascii_uppercase + '_' + string.digits:
                             is_constant_def = False
                     if is_constant_def:
                         if row[1].startswith('get_generalized_index'):
diff --git a/specs/merge/beacon-chain.md b/specs/merge/beacon-chain.md
index a508cb670..b9c443962 100644
--- a/specs/merge/beacon-chain.md
+++ b/specs/merge/beacon-chain.md
@@ -61,7 +61,7 @@ We define the following Python custom types for type hinting and readability:
 | Name | Value |
 | - | - |
 | `MAX_BYTES_PER_OPAQUE_TRANSACTION` | `uint64(2**20)` (= 1,048,576) |
-| `MAX_APPLICATION_TRANSACTIONS` | `uint64(2**14)` (= 16,384) |
+| `MAX_EXECUTION_TRANSACTIONS` | `uint64(2**14)` (= 16,384) |
 | `BYTES_PER_LOGS_BLOOM` | `uint64(2**8)` (= 256) |
 
 ## Containers
@@ -108,7 +108,7 @@ class ExecutionPayload(Container):
     timestamp: uint64
     receipt_root: Bytes32
     logs_bloom: ByteVector[BYTES_PER_LOGS_BLOOM]
-    transactions: List[OpaqueTransaction, MAX_APPLICATION_TRANSACTIONS]
+    transactions: List[OpaqueTransaction, MAX_EXECUTION_TRANSACTIONS]
 ```
 
 #### `ExecutionPayloadHeader`