diff --git a/packages/nextra-theme-blog/style.css b/packages/nextra-theme-blog/style.css
index b30d7e7..ae7d464 100644
--- a/packages/nextra-theme-blog/style.css
+++ b/packages/nextra-theme-blog/style.css
@@ -1685,6 +1685,8 @@ article img {
 }
 h1 {
   letter-spacing: -0.03em;
+  word-break: keep-all;
+  overflow-wrap: anywhere;
 }
 .nx-prose code:before,
 .nx-prose code:after {