diff --git a/ui/src/message/Message.tsx b/ui/src/message/Message.tsx
index 954f03c..cf324e9 100644
--- a/ui/src/message/Message.tsx
+++ b/ui/src/message/Message.tsx
@@ -60,6 +60,9 @@ const styles = (theme: Theme) =>
             '& pre': {
                 overflow: 'auto',
             },
+            '& img': {
+                maxWidth: '100%',
+            },
         },
     });