diff --git a/hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java b/hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java
index 17d0a5371..dff8e3c6a 100644
--- a/hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java
+++ b/hugegraph-client/src/main/java/org/apache/hugegraph/api/graphs/GraphsAPI.java
@@ -74,7 +74,7 @@ protected String type() {
     @SuppressWarnings("unchecked")
     public Map<String, String> create(String name, String cloneGraphName, String configText) {
         this.client.checkApiVersion("0.67", "dynamic graph add");
-        RestHeaders headers = new RestHeaders().add(RestHeaders.CONTENT_TYPE, "text/plain");
+        RestHeaders headers = new RestHeaders().add(RestHeaders.CONTENT_TYPE, "application/json");
         Map<String, Object> params = null;
         if (StringUtils.isNotEmpty(cloneGraphName)) {
             params = ImmutableMap.of("clone_graph_name", cloneGraphName);