diff --git a/packages/core/admin/admin/src/content-manager/components/BlocksEditor/hooks/useBlocksStore.js b/packages/core/admin/admin/src/content-manager/components/BlocksEditor/hooks/useBlocksStore.js
index e78bf660ed..d505a04dfc 100644
--- a/packages/core/admin/admin/src/content-manager/components/BlocksEditor/hooks/useBlocksStore.js
+++ b/packages/core/admin/admin/src/content-manager/components/BlocksEditor/hooks/useBlocksStore.js
@@ -100,6 +100,7 @@ const CodeBlock = styled.pre.attrs({ role: 'code' })`
   max-width: 100%;
   overflow: auto;
   padding: ${({ theme }) => `${theme.spaces[3]} ${theme.spaces[4]}`};
+  flex-shrink: 0;
   & > code {
     font-family: 'SF Mono', SFMono-Regular, ui-monospace, 'DejaVu Sans Mono', Menlo, Consolas,
       monospace;