diff --git a/CHANGELOG b/CHANGELOG
index aa1d1ce..d90eb3c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -3,6 +3,7 @@
 * Fix source code link
 * Upgrade to Lucky 0.30.1
 * Upgrade to Crystal 1.5.0
+* Add scrollbar to long code blocks
 
 2022-05-21
 
diff --git a/src/css/app.css b/src/css/app.css
index a87e8c7..3799385 100644
--- a/src/css/app.css
+++ b/src/css/app.css
@@ -34,3 +34,10 @@ figure iframe {
 footer p span {
   margin-right: 1em;
 }
+
+pre {
+  background-color: rgba(127, 127, 127, 0.1);
+  padding: 1em;
+  overflow-x: scroll;
+  width: 100%;
+}