diff --git a/js/gamutable.es6.js b/js/gamutable.es6.js
index d75708a..615d7d6 100644
--- a/js/gamutable.es6.js
+++ b/js/gamutable.es6.js
@@ -220,7 +220,9 @@ let monTableau = {
 				if (data && data.length) {
 					let config = data.shift();
 					this.header = config.header;
-					this.crayons = config.crayons;
+					if (config.crayons !== undefined) {
+						this.crayons = config.crayons;
+					}
 					if (config.classes !== undefined) {
 						this.classes = config.classes;
 					}
@@ -236,7 +238,9 @@ let monTableau = {
 				.then((data) => {
 					let config = data.shift();
 					this.header = config.header;
-					this.crayons = config.crayons;
+					if (config.crayons !== undefined) {
+						this.crayons = config.crayons;
+					}
 					if (config.classes !== undefined) {
 						this.classes = config.classes;
 					}
diff --git a/js/gamutable.js b/js/gamutable.js
index e669403..ea64b00 100644
--- a/js/gamutable.js
+++ b/js/gamutable.js
@@ -258,7 +258,10 @@ var monTableau = {
         if (data && data.length) {
           var config = data.shift();
           this.header = config.header;
-          this.crayons = config.crayons;
+
+          if (config.crayons !== undefined) {
+            this.crayons = config.crayons;
+          }
 
           if (config.classes !== undefined) {
             this.classes = config.classes;
@@ -279,7 +282,10 @@ var monTableau = {
       }).then(function (data) {
         var config = data.shift();
         _this2.header = config.header;
-        _this2.crayons = config.crayons;
+
+        if (config.crayons !== undefined) {
+          _this2.crayons = config.crayons;
+        }
 
         if (config.classes !== undefined) {
           _this2.classes = config.classes;