diff --git a/README.md b/README.md
index 68da7fe..52d4829 100644
--- a/README.md
+++ b/README.md
@@ -1541,7 +1541,7 @@ class MyClass(metaclass=MyMetaClass):
 ('abcde', 12345)
 ```
 
-#### Type diagram ('abc' is a str, str is a type, ...):
+#### Type diagram (str is an instance of type, ...):
 ```text
 +---------+-------------+
 | classes | metaclasses |
@@ -1554,7 +1554,7 @@ class MyClass(metaclass=MyMetaClass):
 +---------+-------------+
 ```
 
-#### Inheritance diagram (str inherits from object, ...):
+#### Inheritance diagram (str is a subclass of object, ...):
 ```text
 +---------+-------------+
 | classes | metaclasses |
diff --git a/index.html b/index.html
index ed3489a..e384294 100644
--- a/index.html
+++ b/index.html
@@ -1264,7 +1264,7 @@ param_names  = list(<sig>.parameters.keys())
 <pre><code class="python language-python hljs"><span class="hljs-meta">&gt;&gt;&gt; </span>MyClass.a, MyClass.b
 (<span class="hljs-string">'abcde'</span>, <span class="hljs-number">12345</span>)
 </code></pre>
-<h4 id="typediagramabcisastrstrisatype">Type diagram ('abc' is a str, str is a type, …):</h4>
+<h4 id="typediagramstrisaninstanceoftype">Type diagram (str is an instance of type, …):</h4>
 <pre><code class="text language-text">┏━━━━━━━━━┯━━━━━━━━━━━━━┓
 ┃ classes │ metaclasses ┃
 ┠─────────┼─────────────┨
@@ -1275,7 +1275,7 @@ param_names  = list(&lt;sig&gt;.parameters.keys())
 ┃   str ───────╯        ┃
 ┗━━━━━━━━━┷━━━━━━━━━━━━━┛
 </code></pre>
-<h4 id="inheritancediagramstrinheritsfromobject">Inheritance diagram (str inherits from object, …):</h4>
+<h4 id="inheritancediagramstrisasubclassofobject">Inheritance diagram (str is a subclass of object, …):</h4>
 <pre><code class="text language-text">┏━━━━━━━━━┯━━━━━━━━━━━━━┓
 ┃ classes │ metaclasses ┃
 ┠─────────┼─────────────┨