diff --git a/mdit_py_plugins/dollarmath/index.py b/mdit_py_plugins/dollarmath/index.py
index acfd83f..b5a6b68 100644
--- a/mdit_py_plugins/dollarmath/index.py
+++ b/mdit_py_plugins/dollarmath/index.py
@@ -100,7 +100,7 @@ def render_math_inline_double(
         env: EnvType,
     ) -> str:
         content = _renderer(str(tokens[idx].content).strip(), {"display_mode": True})
-        return f'<div class="math inline">{content}</div>'
+        return f'<div class="math block">{content}</div>'
 
     def render_math_block(
         self: RendererProtocol,
diff --git a/tests/fixtures/dollar_math.md b/tests/fixtures/dollar_math.md
index 08a2e90..4c940a5 100644
--- a/tests/fixtures/dollar_math.md
+++ b/tests/fixtures/dollar_math.md
@@ -516,21 +516,21 @@ Inline double-dollar start:
 .
 $$a=1$$ b
 .
-<p><div class="math inline">a=1</div> b</p>
+<p><div class="math block">a=1</div> b</p>
 .
 
 Inline double-dollar end:
 .
 a $$a=1$$
 .
-<p>a <div class="math inline">a=1</div></p>
+<p>a <div class="math block">a=1</div></p>
 .
 
 Inline double-dollar enclosed:
 .
 a $$a=1$$ (1) b
 .
-<p>a <div class="math inline">a=1</div> (1) b</p>
+<p>a <div class="math block">a=1</div> (1) b</p>
 .
 
 Inline double-dollar, escaped:
@@ -549,7 +549,7 @@ $$
 i.e., $[\alpha \bar{X}, \infty)$ is a lower 1-sided $1-\alpha$ confidence bound for $\mu$.
 .
 <p>Hence, for <span class="math inline">\alpha \in (0, 1)</span>,
-<div class="math inline">\mathbb P (\alpha \bar{X} \ge \mu) \le \alpha;</div>
+<div class="math block">\mathbb P (\alpha \bar{X} \ge \mu) \le \alpha;</div>
 i.e., <span class="math inline">[\alpha \bar{X}, \infty)</span> is a lower 1-sided <span class="math inline">1-\alpha</span> confidence bound for <span class="math inline">\mu</span>.</p>
 .