diff --git a/packages/editor/src/styles.css b/packages/editor/src/styles.css
index 05db976cc..a7dec52a1 100644
--- a/packages/editor/src/styles.css
+++ b/packages/editor/src/styles.css
@@ -384,6 +384,11 @@ span:focus .fake-cursor {
   margin: 0;
 }
 
+.math-block .katex {
+  max-width: 100vw;
+  overflow-x: auto;
+}
+
 /* -- Selection Plugin ---------------------------------- */
 
 /* p::selection,
diff --git a/packages/editor/styles/styles.css b/packages/editor/styles/styles.css
index 05db976cc..a7dec52a1 100644
--- a/packages/editor/styles/styles.css
+++ b/packages/editor/styles/styles.css
@@ -384,6 +384,11 @@ span:focus .fake-cursor {
   margin: 0;
 }
 
+.math-block .katex {
+  max-width: 100vw;
+  overflow-x: auto;
+}
+
 /* -- Selection Plugin ---------------------------------- */
 
 /* p::selection,