diff --git a/src/core/client/ui/components/Flex/Flex.css b/src/core/client/ui/components/Flex/Flex.css
index ea5bf810d..9fed320d3 100644
--- a/src/core/client/ui/components/Flex/Flex.css
+++ b/src/core/client/ui/components/Flex/Flex.css
@@ -1,10 +1,12 @@
 .root {
   flex-grow: 1;
+  max-width: 100%;
 }
 
 .flex {
   display: flex;
   flex-grow: 1;
+  max-width: 100%;
 }
 
 .halfItemGutter {