diff --git a/includes/admin/reports/class-wc-report-coupon-usage.php b/includes/admin/reports/class-wc-report-coupon-usage.php
index b9df08ef212..8ffa3ced785 100644
--- a/includes/admin/reports/class-wc-report-coupon-usage.php
+++ b/includes/admin/reports/class-wc-report-coupon-usage.php
@@ -446,46 +446,46 @@ class WC_Report_Coupon_Usage extends WC_Admin_Report {
 							legend: {
 								show: false
 							},
-						    grid: {
-						        color: '#aaa',
-						        borderColor: 'transparent',
-						        borderWidth: 0,
-						        hoverable: true
-						    },
-						    xaxes: [ {
-						    	color: '#aaa',
-						    	position: "bottom",
-						    	tickColor: 'transparent',
+							grid: {
+								color: '#aaa',
+								borderColor: 'transparent',
+								borderWidth: 0,
+								hoverable: true
+							},
+							xaxes: [ {
+								color: '#aaa',
+								position: "bottom",
+								tickColor: 'transparent',
 								mode: "time",
 								timeformat: "<?php if ( $this->chart_groupby == 'day' ) echo '%d %b'; else echo '%b'; ?>",
 								monthNames: <?php echo json_encode( array_values( $wp_locale->month_abbrev ) ) ?>,
 								tickLength: 1,
 								minTickSize: [1, "<?php echo $this->chart_groupby; ?>"],
 								font: {
-						    		color: "#aaa"
-						    	}
+									color: "#aaa"
+								}
 							} ],
-						    yaxes: [
-						    	{
-						    		min: 0,
-						    		minTickSize: 1,
-						    		tickDecimals: 0,
-						    		color: '#ecf0f1',
-						    		font: { color: "#aaa" }
-						    	},
-						    	{
-						    		position: "right",
-						    		min: 0,
-						    		tickDecimals: 2,
-						    		alignTicksWithAxis: 1,
-						    		color: 'transparent',
-						    		font: { color: "#aaa" }
-						    	}
-						    ],
-				 		}
-				 	);
+							yaxes: [
+								{
+									min: 0,
+									minTickSize: 1,
+									tickDecimals: 0,
+									color: '#ecf0f1',
+									font: { color: "#aaa" }
+								},
+								{
+									position: "right",
+									min: 0,
+									tickDecimals: 2,
+									alignTicksWithAxis: 1,
+									color: 'transparent',
+									font: { color: "#aaa" }
+								}
+							],
+						}
+					);
 
-				 	jQuery('.chart-placeholder').resize();
+					jQuery('.chart-placeholder').resize();
 				}
 
 				drawGraph();