diff --git a/.travis.yml b/.travis.yml
index f31b3ba..d91e0e3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 language: go
 
 go:
+  - 1.10.x
+  - 1.11.x
   - 1.12.x
   - tip
 
diff --git a/export/csv.go b/export/csv.go
index 893c4e0..00efd05 100644
--- a/export/csv.go
+++ b/export/csv.go
@@ -44,9 +44,8 @@ func (e *CSV) Export(exports chan interface{}) {
 				values = append(values, fmt.Sprint(val.Index(i)))
 			}
 		case reflect.Map:
-			iter := val.MapRange()
-			for iter.Next() {
-				values = append(values, fmt.Sprint(iter.Value()))
+			for _, key := range val.MapKeys() {
+				values = append(values, fmt.Sprint(val.MapIndex(key)))
 			}
 			sort.Strings(values)
 		}