diff --git a/src/components/ExchangePage/index.js b/src/components/ExchangePage/index.js
index f3f9064d..f5c7f129 100644
--- a/src/components/ExchangePage/index.js
+++ b/src/components/ExchangePage/index.js
@@ -41,7 +41,7 @@ class ExchangePage extends PureComponent<Props> {
     ]
 
     return (
-      <Box>
+      <Box pb={6}>
         <Box ff="Museo Sans|Regular" color="dark" fontSize={7} mb={5}>
           {t('app:exchange.title')}
         </Box>
diff --git a/src/components/StickyBackToTop.js b/src/components/StickyBackToTop.js
index 9e106978..dd2533b7 100644
--- a/src/components/StickyBackToTop.js
+++ b/src/components/StickyBackToTop.js
@@ -49,6 +49,7 @@ class StickyBackToTop extends PureComponent<Props, State> {
     const { scrollContainer } = this.props.getGrowScroll()
     if (scrollContainer) {
       const listener = () => {
+        if (this._unmounted) return
         const { scrollTop } = scrollContainer
         const visible = scrollTop > this.props.scrollThreshold
         this.setState(previous => {
@@ -59,11 +60,12 @@ class StickyBackToTop extends PureComponent<Props, State> {
         })
       }
       scrollContainer.addEventListener('scroll', listener)
-      this.releaseListener = () => scrollContainer.addEventListener('scroll', listener)
+      this.releaseListener = () => scrollContainer.removeEventListener('scroll', listener)
     }
   }
 
   componentWillUnmount() {
+    this._unmounted = true
     this.releaseListener()
   }