diff --git a/scripts/phase0/build_spec.py b/scripts/phase0/build_spec.py
index ef7c055d2..f7587bad5 100644
--- a/scripts/phase0/build_spec.py
+++ b/scripts/phase0/build_spec.py
@@ -6,7 +6,6 @@ def build_phase0_spec(sourcefile, outfile):
     code_lines = []
     code_lines.append("""
 
-import copy
 from typing import (
     Any,
     Dict,