diff --git a/workflows/tests/test_variable_utils_yaml.py b/workflows/tests/test_variable_utils_yaml.py
new file mode 100644
index 0000000..e79f003
--- /dev/null
+++ b/workflows/tests/test_variable_utils_yaml.py
@@ -0,0 +1,19 @@
+"""Test that process_workflow_file_with_markers handles YAML workflow files."""
+
+import json
+from pathlib import Path
+
+import pytest
+
+from workflow_use.healing.variable_utils import process_workflow_file_with_markers
+
+_FIXTURE = Path(__file__).parent / 'test_go_back.workflow.yaml'
+
+
+def test_process_yaml_workflow_does_not_raise(tmp_path):
+	"""YAML workflow files must be parsed without JSONDecodeError."""
+	output_file = tmp_path / 'output.json'
+	result = process_workflow_file_with_markers(_FIXTURE, output_path=output_file)
+	assert output_file.exists()
+	data = json.loads(output_file.read_text())
+	assert data['name'] == 'Test Go Back'
diff --git a/workflows/workflow_use/healing/variable_utils.py b/workflows/workflow_use/healing/variable_utils.py
index 298f545..647408e 100644
--- a/workflows/workflow_use/healing/variable_utils.py
+++ b/workflows/workflow_use/healing/variable_utils.py
@@ -4,6 +4,8 @@
 from pathlib import Path
 from typing import Optional
 
+import yaml
+
 from workflow_use.healing.variable_extractor import VariableExtractor
 from workflow_use.schema.views import WorkflowDefinitionSchema
 
@@ -57,9 +59,12 @@ def process_workflow_file_with_markers(
 	input_path = Path(input_path)
 	output_path = Path(output_path) if output_path else input_path
 
-	# Load the workflow
+	# Load the workflow — storage service persists as YAML; fall back to JSON
 	with open(input_path, 'r') as f:
-		workflow_data = json.load(f)
+		if input_path.suffix in {'.yaml', '.yml'}:
+			workflow_data = yaml.safe_load(f)
+		else:
+			workflow_data = json.load(f)
 
 	workflow = WorkflowDefinitionSchema(**workflow_data)