diff --git a/styles/global.css b/styles/global.css
index 1aa135bc2..644506f78 100644
--- a/styles/global.css
+++ b/styles/global.css
@@ -7,6 +7,14 @@
 @import "@telegraph/input/default.css";
 @import "@telegraph/menu/default.css";
 
+/* Prevent line numbers from being copied when selecting code */
+.react-syntax-highlighter-line-number {
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+}
+
 .tgraph-content {
   color: var(--tgph-gray-12) !important;
 }