diff --git a/src/components/activity/index.js b/src/components/activity/index.js
index faf699e..5e1c2d8 100644
--- a/src/components/activity/index.js
+++ b/src/components/activity/index.js
@@ -240,6 +240,12 @@ const ActivityChart = ({
                     <Tab.Pane eventKey="contributor">
                       <ReactECharts
                         option={option}
+                        opts={{ renderer: "svg" }}
+                        onEvents={{
+                          finished: () => {
+                            window.echartsRenderFinished = true;
+                          }
+                        }}
                         ref={e => {
                           if (e) {
                             const echartInstance = e.getEchartsInstance();
diff --git a/src/components/contributor/index.js b/src/components/contributor/index.js
index 6eb8159..4a9cd92 100644
--- a/src/components/contributor/index.js
+++ b/src/components/contributor/index.js
@@ -372,6 +372,12 @@ const ContributorLineChart = ({
             </div>
             <ReactECharts
               option={option}
+              opts={{ renderer: "svg" }}
+              onEvents={{
+                finished: () => {
+                  window.echartsRenderFinished = true;
+                }
+              }}
               ref={e => {
                 if (e) {
                   const echartInstance = e.getEchartsInstance();
diff --git a/src/components/contributor/service.js b/src/components/contributor/service.js
index 4e09674..e903275 100644
--- a/src/components/contributor/service.js
+++ b/src/components/contributor/service.js
@@ -112,7 +112,6 @@ export const fetchMergeContributor = (repo, showAlert) => {
         return response.json();
       })
       .then(myJson => {
-        console.log('myJson: ', myJson);
         resolve({ repo, ...myJson });
       })
       .catch(e => {
diff --git a/src/constants.js b/src/constants.js
index 37cd21a..bbb60ef 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,5 +1,5 @@
 export const generateDefaultOption = ({
-  handleShareClick = () => {}
+  handleShareClick = () => { }
 }) => {
   return {
     color: ["#39a85a", "#4385ee", "#fabc37", "#2dc1dd", "#f972cf", "#8331c8"],
@@ -24,7 +24,7 @@ export const generateDefaultOption = ({
     },
     dataset: [],
     title: {
-      text: "Contributor Over Time"
+      text: ""
     },
     tooltip: {
       trigger: "axis"
@@ -61,7 +61,7 @@ export const generateDefaultOption = ({
 };
 
 export const generateMonthlyActivityOption = ({
-  handleShareClick = () => {}
+  handleShareClick = () => { }
 }) => {
   return {
     toolbox: {
@@ -145,4 +145,4 @@ export const DEFAULT_CONTAINER_STYLE = {
   width: "996px",
   border: "1px solid #dadce0",
   borderRadius: "12px"
-};
\ No newline at end of file
+};