diff --git a/utils/codegen/generate-config-info.py b/utils/codegen/generate-config-info.py
index a25167affb4..c54a5cf2536 100644
--- a/utils/codegen/generate-config-info.py
+++ b/utils/codegen/generate-config-info.py
@@ -945,7 +945,7 @@ def generate(config, output_dir, source_mrdocs_dir):
     # metadata the header carries, so there are no longer any generated
     # ConfigSchema.cpp or PublicToolArgs sources.
     config_schema_hpp = generate_config_schema_hpp(config)
-    with open(os.path.join(mrdocs_build_include_dir, 'ConfigSchema.hpp'), 'w') as f:
+    with open(os.path.join(mrdocs_build_include_dir, 'ConfigSchema.hpp'), 'w', encoding='utf-8') as f:
         f.write(config_schema_hpp)
 
 
@@ -963,7 +963,7 @@ def main():
         sys.exit(1)
 
     # parse input file
-    with open(input_file, 'r') as f:
+    with open(input_file, 'r', encoding='utf-8') as f:
         config = json.load(f)
 
     generate(config, output_dir, os.path.dirname(os.path.abspath(input_file)))
diff --git a/utils/codegen/generate-version-header.py b/utils/codegen/generate-version-header.py
index e6982fa2c9e..a246d59e4bd 100644
--- a/utils/codegen/generate-version-header.py
+++ b/utils/codegen/generate-version-header.py
@@ -157,7 +157,7 @@ def main():
     }
 
     content = ''
-    with open(args.template, "r") as f:
+    with open(args.template, "r", encoding="utf-8") as f:
         content = f.read()
     for name, value in substitutions.items():
         content = content.replace(f"@{name}@", value)
@@ -166,12 +166,12 @@ def main():
     # file (and never triggers a rebuild of everything that includes it).
     previous = None
     if os.path.exists(args.output):
-        with open(args.output, "r") as f:
+        with open(args.output, "r", encoding="utf-8") as f:
             previous = f.read()
     if content != previous:
         if os.path.dirname(args.output):
             os.makedirs(os.path.dirname(args.output), exist_ok=True)
-        with open(args.output, "w") as f:
+        with open(args.output, "w", encoding="utf-8") as f:
             f.write(content)
 
 
diff --git a/utils/codegen/generate-yaml-schema.py b/utils/codegen/generate-yaml-schema.py
index 2adda4b2694..e8393799912 100644
--- a/utils/codegen/generate-yaml-schema.py
+++ b/utils/codegen/generate-yaml-schema.py
@@ -172,13 +172,13 @@ def main():
 
     # Generate the schema
     mrdocs_config_path = os.path.join(mrdocs_root_dir, 'src', 'mrdocs', 'ConfigOptions.json')
-    with open(mrdocs_config_path, 'r') as f:
+    with open(mrdocs_config_path, 'r', encoding='utf-8') as f:
         config = json.loads(f.read())
     yaml_schema = generate_yaml_schema(config)
 
     if args.check:
         # Check if the generated schema matches the existing schema
-        with open(mrdocs_schema_path, 'r') as f:
+        with open(mrdocs_schema_path, 'r', encoding='utf-8') as f:
             existing_schema = f.read()
         if yaml_schema != existing_schema:
             print(
@@ -190,7 +190,7 @@ def main():
             print("The generated schema matches the existing schema.")
     else:
         # Write the schema to the file
-        with open(mrdocs_schema_path, 'w') as f:
+        with open(mrdocs_schema_path, 'w', encoding='utf-8', newline='\n') as f:
             f.write(yaml_schema)
 
 
diff --git a/utils/codegen/generate.py b/utils/codegen/generate.py
index ee4198c2e83..0bd8748afed 100644
--- a/utils/codegen/generate.py
+++ b/utils/codegen/generate.py
@@ -124,7 +124,7 @@ def GenerateIndexedCppFiles(parentDirectory, fileContents):
     for index, aDeclaration in enumerate(contents):
         fileName = name_fmt.format(index)
         filePath = os.path.join(parentDirectory, fileName)
-        with open(filePath, "w") as f:
+        with open(filePath, "w", encoding="utf-8") as f:
             f.write(aDeclaration)