diff --git a/assets/css/common/main.css b/assets/css/common/main.css
index c47e300..50022ac 100644
--- a/assets/css/common/main.css
+++ b/assets/css/common/main.css
@@ -59,6 +59,7 @@ pre {
     border-radius: var(--radius);
     padding: 0 5px;
     font-size: 14px;
+    user-select: none;
 }
 
 div.highlight:hover .copy-code,
diff --git a/assets/css/common/post-single.css b/assets/css/common/post-single.css
index bc7f25e..79ccbec 100644
--- a/assets/css/common/post-single.css
+++ b/assets/css/common/post-single.css
@@ -366,6 +366,7 @@ h6:hover .anchor {
     color: var(--secondary);
     margin-inline-start: 8px;
     font-weight: 500;
+    user-select: none;
 }
 
 .post-content :not(table) ::-webkit-scrollbar-thumb {