diff --git a/.travis.yml b/.travis.yml
index 18e7b30..9fd3745 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,18 +4,25 @@ go:
   - 1.1
   - 1.2
   - 1.3
+  - 1.4.2
   - tip
 
 env:
   matrix:
-    - ES_VERSION=1.0.3
-    - ES_VERSION=1.1.2
-    - ES_VERSION=1.2.1
+    - ES_VERSION=1.0.3 GROOVY_VER=2.0.0
+    - ES_VERSION=1.1.2 GROOVY_VER=2.0.0
+    - ES_VERSION=1.2.1 GROOVY_VER=2.2.0
+    - ES_VERSION=1.3.4
+    - ES_VERSION=1.4.4
+    - ES_VERSION=1.5.2
+    - ES_VERSION=1.6.0
 
 before_script:
   - mkdir ${HOME}/elasticsearch
-  - wget http://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-${ES_VERSION}.tar.gz
+  - wget https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-${ES_VERSION}.tar.gz
   - tar -xzf elasticsearch-${ES_VERSION}.tar.gz -C ${HOME}/elasticsearch
+  - "echo 'script.groovy.sandbox.enabled: true' >> ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/config/elasticsearch.yml"
+  - 'if [[ "${ES_VERSION}" < "1.3" ]]; then ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/bin/plugin --install elasticsearch/elasticsearch-lang-groovy/${GROOVY_VER}; fi'
   - ${HOME}/elasticsearch/elasticsearch-${ES_VERSION}/bin/elasticsearch >/dev/null &
 
 install:
diff --git a/goes.go b/goes.go
index d4c05ba..ccffa5c 100644
--- a/goes.go
+++ b/goes.go
@@ -41,7 +41,7 @@ func (c *Connection) WithClient(cl *http.Client) *Connection {
 }
 
 // CreateIndex creates a new index represented by a name and a mapping
-func (c *Connection) CreateIndex(name string, mapping map[string]interface{}) (*Response, error) {
+func (c *Connection) CreateIndex(name string, mapping interface{}) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     mapping,
@@ -196,7 +196,7 @@ func (c *Connection) BulkSend(documents []Document) (*Response, error) {
 }
 
 // Search executes a search query against an index
-func (c *Connection) Search(query map[string]interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
+func (c *Connection) Search(query interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     query,
@@ -211,7 +211,7 @@ func (c *Connection) Search(query map[string]interface{}, indexList []string, ty
 }
 
 // Count executes a count query against an index, use the Count field in the response for the result
-func (c *Connection) Count(query map[string]interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
+func (c *Connection) Count(query interface{}, indexList []string, typeList []string, extraArgs url.Values) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     query,
@@ -228,7 +228,7 @@ func (c *Connection) Count(query map[string]interface{}, indexList []string, typ
 //Query runs a query against an index using the provided http method.
 //This method can be used to execute a delete by query, just pass in "DELETE"
 //for the HTTP method.
-func (c *Connection) Query(query map[string]interface{}, indexList []string, typeList []string, httpMethod string, extraArgs url.Values) (*Response, error) {
+func (c *Connection) Query(query interface{}, indexList []string, typeList []string, httpMethod string, extraArgs url.Values) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     query,
@@ -243,7 +243,7 @@ func (c *Connection) Query(query map[string]interface{}, indexList []string, typ
 }
 
 // Scan starts scroll over an index
-func (c *Connection) Scan(query map[string]interface{}, indexList []string, typeList []string, timeout string, size int) (*Response, error) {
+func (c *Connection) Scan(query interface{}, indexList []string, typeList []string, timeout string, size int) (*Response, error) {
 	v := url.Values{}
 	v.Add("search_type", "scan")
 	v.Add("scroll", timeout)
@@ -354,7 +354,7 @@ func (req *Request) Run() (*Response, error) {
 	}
 
 	if req.method == "POST" || req.method == "PUT" {
-		newReq.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+		newReq.Header.Set("Content-Type", "application/json")
 	}
 
 	resp, err := req.Conn.Client.Do(newReq)
@@ -459,7 +459,7 @@ func (b Bucket) Aggregation(name string) Aggregation {
 }
 
 // PutMapping registers a specific mapping for one or more types in one or more indexes
-func (c *Connection) PutMapping(typeName string, mapping map[string]interface{}, indexes []string) (*Response, error) {
+func (c *Connection) PutMapping(typeName string, mapping interface{}, indexes []string) (*Response, error) {
 
 	r := Request{
 		Conn:      c,
@@ -498,7 +498,7 @@ func (c *Connection) IndicesExist(indexes []string) (bool, error) {
 	return resp.Status == 200, err
 }
 
-func (c *Connection) Update(d Document, query map[string]interface{}, extraArgs url.Values) (*Response, error) {
+func (c *Connection) Update(d Document, query interface{}, extraArgs url.Values) (*Response, error) {
 	r := Request{
 		Conn:      c,
 		Query:     query,
diff --git a/goes_test.go b/goes_test.go
index 0ae5605..e3ca46d 100644
--- a/goes_test.go
+++ b/goes_test.go
@@ -788,6 +788,8 @@ func (s *GoesTestSuite) TestIndexStatus(c *C) {
 
 	// gives ES some time to do its job
 	time.Sleep(1 * time.Second)
+	_, err = conn.RefreshIndex(indexName)
+	c.Assert(err, IsNil)
 
 	response, err := conn.IndexStatus([]string{"testindexstatus"})
 	c.Assert(err, IsNil)
@@ -797,9 +799,11 @@ func (s *GoesTestSuite) TestIndexStatus(c *C) {
 
 	primarySizeInBytes := response.Indices[indexName].Index["primary_size_in_bytes"].(float64)
 	sizeInBytes := response.Indices[indexName].Index["size_in_bytes"].(float64)
+	refreshTotal := response.Indices[indexName].Refresh["total"].(float64)
 
 	c.Assert(primarySizeInBytes > 0, Equals, true)
 	c.Assert(sizeInBytes > 0, Equals, true)
+	c.Assert(refreshTotal > 0, Equals, true)
 
 	expectedIndices := map[string]IndexStatus{
 		indexName: {
@@ -825,7 +829,7 @@ func (s *GoesTestSuite) TestIndexStatus(c *C) {
 				"total_size_in_bytes":   float64(0),
 			},
 			Refresh: map[string]interface{}{
-				"total":                float64(1),
+				"total":                refreshTotal,
 				"total_time_in_millis": float64(0),
 			},
 			Flush: map[string]interface{}{
@@ -1155,6 +1159,7 @@ func (s *GoesTestSuite) TestUpdate(c *C) {
 	// Now that we have an ordinary document indexed, try updating it
 	query := map[string]interface{}{
 		"script": "ctx._source.counter += count",
+		"lang":   "groovy",
 		"params": map[string]interface{}{
 			"count": 5,
 		},
@@ -1166,7 +1171,7 @@ func (s *GoesTestSuite) TestUpdate(c *C) {
 	}
 
 	response, err = conn.Update(d, query, extraArgs)
-	if err != nil && strings.Contains(err.(*SearchError).Msg, "dynamic scripting disabled") {
+	if err != nil && strings.Contains(err.(*SearchError).Msg, "dynamic scripting") {
 		c.Skip("Scripting is disabled on server, skipping this test")
 		return
 	}