diff --git a/docs/2022-07-31-experiment-go.html b/docs/2022-07-31-experiment-go.html
index 99b0063..2a759b6 100644
--- a/docs/2022-07-31-experiment-go.html
+++ b/docs/2022-07-31-experiment-go.html
@@ -40,7 +40,7 @@
       There come a time when you need to experiment new things, new style, new
       approach. So this post serves as it is named.
     </p>
-    <h1
+    <h2
       id="user-content-design-api-by-trimming-down-the-interfacestruct-or-whatever"
     >
       <a
@@ -51,7 +51,7 @@
           class="octicon octicon-link"
         ></span
       ></a>
-    </h1>
+    </h2>
     <p>Instead of:</p>
     <div class="highlight highlight-source-go">
       <pre><span class="pl-k">type</span> <span class="pl-smi">Client</span> <span class="pl-k">interface</span> {
diff --git a/posts/2022-07-31-experiment-go.md b/posts/2022-07-31-experiment-go.md
index 65766f4..64ad716 100644
--- a/posts/2022-07-31-experiment-go.md
+++ b/posts/2022-07-31-experiment-go.md
@@ -3,7 +3,7 @@
 There come a time when you need to experiment new things, new style, new
 approach. So this post serves as it is named.
 
-# Design API by trimming down the interface/struct or whatever
+## Design API by trimming down the interface/struct or whatever
 
 Instead of: