diff --git a/assets/css/common/post-single.css b/assets/css/common/post-single.css
index 3773f2a..70bb24f 100644
--- a/assets/css/common/post-single.css
+++ b/assets/css/common/post-single.css
@@ -55,7 +55,7 @@
 }
 
 .post-content h4 {
-    font-size: 16px;
+    font-size: 20px;
 }
 
 .post-content h5 {