diff --git a/packages/app/README.md b/packages/app/README.md
index 852b1c890..eae05d487 100644
--- a/packages/app/README.md
+++ b/packages/app/README.md
@@ -72,7 +72,9 @@ various front-end development stacks:
 
 ### Browser support
 
-H5Web works out of the box on **Firefox 78 ESR**. Support for Firefox 68 ESR is possible by polyfilling the `ResizeObserver` API. Older versions of Firefox are not supported.
+H5Web works out of the box on **Firefox 78 ESR**. Support for Firefox 68 ESR is
+possible by polyfilling the `ResizeObserver` API. Older versions of Firefox are
+not supported.
 
 ## API reference
 
diff --git a/packages/lib/README.md b/packages/lib/README.md
index fedaadcfd..96f626536 100644
--- a/packages/lib/README.md
+++ b/packages/lib/README.md
@@ -83,4 +83,6 @@ various front-end development stacks:
 
 ### Browser support
 
-H5Web works out of the box on **Firefox 78 ESR**. Support for Firefox 68 ESR is possible by polyfilling the `ResizeObserver` API. Older versions of Firefox are not supported.
+H5Web works out of the box on **Firefox 78 ESR**. Support for Firefox 68 ESR is
+possible by polyfilling the `ResizeObserver` API. Older versions of Firefox are
+not supported.