diff --git a/src/css/custom.css b/src/css/custom.css
index 879b630..1d90e32 100644
--- a/src/css/custom.css
+++ b/src/css/custom.css
@@ -30,6 +30,14 @@ pre, code, kbd, var, tt {
   font-family: 'Iosevka', 'Cascadia Code PL', 'JetBrains Mono', 'Fira Code', 'Hack', monospace;
 }
 
+[data-theme='dark'] pre,
+[data-theme='dark'] code,
+[data-theme='dark'] kbd,
+[data-theme='dark'] var,
+[data-theme='dark'] tt {
+  font-weight: 350;
+}
+
 [data-theme='light'] img[src$='#gh-dark-mode-only'],
 [data-theme='dark'] img[src$='#gh-light-mode-only'] {
   display: none;