diff --git a/components/md-renderer/mdx-components/heading.tsx b/components/md-renderer/mdx-components/heading.tsx
index d3d98b888..42aa7d557 100644
--- a/components/md-renderer/mdx-components/heading.tsx
+++ b/components/md-renderer/mdx-components/heading.tsx
@@ -36,6 +36,7 @@ const HeaderLink = styled.a`
 const H1 = styled.h1`
   position: relative;
   font-size: 42px;
+  line-height: 40px;
   font-weight: 700;
   margin: 32px 0 10px !important;
 
diff --git a/components/md-renderer/mdx-components/iframe.js b/components/md-renderer/mdx-components/iframe.tsx
similarity index 100%
rename from components/md-renderer/mdx-components/iframe.js
rename to components/md-renderer/mdx-components/iframe.tsx
diff --git a/components/md-renderer/mdx-components/img.js b/components/md-renderer/mdx-components/img.tsx
similarity index 100%
rename from components/md-renderer/mdx-components/img.js
rename to components/md-renderer/mdx-components/img.tsx
diff --git a/components/md-renderer/mdx-components/index.js b/components/md-renderer/mdx-components/index.tsx
similarity index 100%
rename from components/md-renderer/mdx-components/index.js
rename to components/md-renderer/mdx-components/index.tsx