diff --git a/assets/css/lesson.scss b/assets/css/lesson.scss
index 2317cb9c9e2f516f2524e82c3d0b052c0a89fb83..d2a2f29f6b21d7afccb07ffff29988ab24d481ec 100644
--- a/assets/css/lesson.scss
+++ b/assets/css/lesson.scss
@@ -59,7 +59,7 @@ $color-testimonial: #fc8dc1 !default;
 .language-python pre,
 .r pre,
 .language-r pre,
-.sql pre {
+.sql pre ,
 .language-sql pre {
   border-radius: 0 4px 4px 0;
 }