diff --git a/pkg/morph/client/client.go b/pkg/morph/client/client.go
index bf24cd831..1e4e0c0b3 100644
--- a/pkg/morph/client/client.go
+++ b/pkg/morph/client/client.go
@@ -162,6 +162,8 @@ func toStackParameter(value interface{}) (sc.Parameter, error) {
 
 		result.Type = sc.ArrayType
 		result.Value = arr
+	case string:
+		result.Type = sc.StringType
 	default:
 		return result, errors.Errorf("chain/client: unsupported parameter %v", value)
 	}
diff --git a/pkg/morph/client/client_test.go b/pkg/morph/client/client_test.go
index cffe1201d..f1b1f6bb3 100644
--- a/pkg/morph/client/client_test.go
+++ b/pkg/morph/client/client_test.go
@@ -20,6 +20,10 @@ func TestToStackParameter(t *testing.T) {
 			value:   int64(100),
 			expType: sc.IntegerType,
 		},
+		{
+			value:   "hello world",
+			expType: sc.StringType,
+		},
 	}
 
 	for _, item := range items {