diff --git a/webapp/packages/plugin-codemirror/src/theme/_base-code-editor.scss b/webapp/packages/plugin-codemirror/src/theme/_base-code-editor.scss
index 9b0adcb3ce..01bb8f5d40 100644
--- a/webapp/packages/plugin-codemirror/src/theme/_base-code-editor.scss
+++ b/webapp/packages/plugin-codemirror/src/theme/_base-code-editor.scss
@@ -87,6 +87,10 @@
       background: rgba(128, 203, 196, 0.2);
     }
 
+    .cm-s-material :global(div).CodeMirror-selected {
+      display: none;
+    }
+
     .CodeMirror :global(pre).CodeMirror-line,
     .CodeMirror :global(pre).CodeMirror-line-like {
       padding: 0 16px;