diff --git a/assets/css/common/post-single.css b/assets/css/common/post-single.css
index 47b9888..e4702f5 100644
--- a/assets/css/common/post-single.css
+++ b/assets/css/common/post-single.css
@@ -254,6 +254,9 @@
 }
 
 .toc {
+    position: sticky;
+    top: .2rem;
+    z-index: 100;
     margin: 0 2px 40px 2px;
     border: 1px solid var(--border);
     background: var(--code-bg);