diff --git a/ctl/export.go b/ctl/export.go
index fa6277f16..295e10039 100644
--- a/ctl/export.go
+++ b/ctl/export.go
@@ -31,7 +31,7 @@ type ExportCommand struct {
 	// Name of the index & frame to export from.
 	Index string
 	Frame string
-	View string
+	View  string
 	// Filename to export to.
 	Path string
 
diff --git a/handler.go b/handler.go
index c4a98d04c..c4a2c2a06 100644
--- a/handler.go
+++ b/handler.go
@@ -42,6 +42,7 @@ import (
 
 	_ "github.com/pilosa/pilosa/statik"
 	"github.com/rakyll/statik/fs"
+	"unicode"
 )
 
 // Handler represents an HTTP handler.
@@ -843,6 +844,12 @@ func (h *Handler) readProtobufQueryRequest(r *http.Request) (*QueryRequest, erro
 // readURLQueryRequest parses query parameters from URL parameters from r.
 func (h *Handler) readURLQueryRequest(r *http.Request) (*QueryRequest, error) {
 	q := r.URL.Query()
+	validQuery := validOptions(QueryRequest{})
+	for key, _ := range q {
+		if _, ok := validQuery[key]; !ok {
+			return nil, errors.New("invalid query params")
+		}
+	}
 
 	// Parse query string.
 	buf, err := ioutil.ReadAll(r.Body)
@@ -875,6 +882,21 @@ func (h *Handler) readURLQueryRequest(r *http.Request) (*QueryRequest, error) {
 	}, nil
 }
 
+// validOptions return all attributes of an interface with lower first character.
+func validOptions(v interface{}) map[string]bool {
+	validQuery := make(map[string]bool)
+	argsType := reflect.ValueOf(v).Type()
+
+	for i := 0; i < argsType.NumField(); i++ {
+		fieldName := argsType.Field(i).Name
+		chars := []rune(fieldName)
+		chars[0] = unicode.ToLower(chars[0])
+		fieldName = string(chars)
+		validQuery[fieldName] = true
+	}
+	return validQuery
+}
+
 // writeQueryResponse writes the response from the executor to w.
 func (h *Handler) writeQueryResponse(w http.ResponseWriter, r *http.Request, resp *QueryResponse) error {
 	if strings.Contains(r.Header.Get("Accept"), "application/x-protobuf") {
diff --git a/handler_test.go b/handler_test.go
index 6744e74ea..427ad043e 100644
--- a/handler_test.go
+++ b/handler_test.go
@@ -209,6 +209,16 @@ func TestHandler_Query_Args_Err(t *testing.T) {
 		t.Fatalf("unexpected body: %q", body)
 	}
 }
+func TestHandler_Query_Params_Err(t *testing.T) {
+	w := httptest.NewRecorder()
+	NewHandler().ServeHTTP(w, MustNewHTTPRequest("POST", "/index/idx0/query?slices=0,1&db=sample", strings.NewReader("Bitmap(id=100)")))
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("unexpected status code: %d", w.Code)
+	} else if body := w.Body.String(); body != `{"error":"invalid query params"}`+"\n" {
+		t.Fatalf("unexpected body: %q", body)
+	}
+
+}
 
 // Ensure the handler can execute a query with a uint64 response as JSON.
 func TestHandler_Query_Uint64_JSON(t *testing.T) {