diff --git a/c3.js b/c3.js
index 87cf59c..c3acd69 100644
--- a/c3.js
+++ b/c3.js
@@ -3962,6 +3962,7 @@
                     wait.add(mainLine.transition().attr('transform', transform));
                     wait.add(mainArea.transition().attr('transform', transform));
                     wait.add(mainCircle.transition().attr('transform', transform));
+                    wait.add(xgrid.transition().attr('transform', transform));
                 })
                 .call(wait, function () {
                     var i, targets = [], eventRects = [];
@@ -3973,8 +3974,11 @@
                     }
                     svg.selectAll('.' + CLASS.shapes).selectAll(targets).remove();
                     svg.selectAll('.' + CLASS.eventRects).selectAll(eventRects).remove();
+                    svg.select('.' + CLASS.xgrid).remove();
 
-                    // draw again for removing flowed elements
+                    // draw again for removing flowed elements and reverting attr
+                    xgrid
+                        .attr('transform', null);
                     mainBar
                         .attr('transform', null)
                         .attr("d", drawBar);
diff --git a/c3.min.js b/c3.min.js
index 7fde78b..cdbff83 100644
--- a/c3.min.js
+++ b/c3.min.js
@@ -1,3 +1,3 @@
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diff --git a/htdocs/samples/api_flow.html b/htdocs/samples/api_flow.html
index 91c5bed..c7909ed 100644
--- a/htdocs/samples/api_flow.html
+++ b/htdocs/samples/api_flow.html
@@ -37,6 +37,14 @@
             max: 1000
 */
           }
+        },
+        grid: {
+          x: {
+            show: true
+          },
+          y: {
+            show: true
+          }
         }
       });
 
diff --git a/htdocs/samples/api_flow_timeseries.html b/htdocs/samples/api_flow_timeseries.html
index 3b1b3f9..7405c3b 100644
--- a/htdocs/samples/api_flow_timeseries.html
+++ b/htdocs/samples/api_flow_timeseries.html
@@ -43,7 +43,17 @@
             max: 1000
 */
           }
+        },
+/* not supported yet
+        grid: {
+          x: {
+            show: true
+          },
+          y: {
+            show: true
+          }
         }
+*/
       });
 
       setTimeout(function () {