diff --git a/res/themes/dark-custom/css/dark-custom.pcss b/res/themes/dark-custom/css/dark-custom.pcss
index dad1ede631..a6c5a7a7b4 100644
--- a/res/themes/dark-custom/css/dark-custom.pcss
+++ b/res/themes/dark-custom/css/dark-custom.pcss
@@ -6,4 +6,5 @@
 @import "../../light-custom/css/_custom.pcss";
 @import "../../../../res/css/_components.pcss";
 @import "../../../../res/css/_compound.pcss";
+@import url("highlight.js/styles/atom-one-light.min.css");
 @import url("github-markdown-css/github-markdown-dark.css");
diff --git a/res/themes/light-custom/css/light-custom.pcss b/res/themes/light-custom/css/light-custom.pcss
index d58df8e68f..c39e9bcf30 100644
--- a/res/themes/light-custom/css/light-custom.pcss
+++ b/res/themes/light-custom/css/light-custom.pcss
@@ -5,4 +5,5 @@
 @import "_custom.pcss";
 @import "../../../../res/css/_components.pcss";
 @import "../../../../res/css/_compound.pcss";
+@import url("highlight.js/styles/atom-one-light.min.css");
 @import url("github-markdown-css/github-markdown-light.css");