diff --git a/AK/StringBuilder.h b/AK/StringBuilder.h
index 04fc816db4..c7e81e8625 100644
--- a/AK/StringBuilder.h
+++ b/AK/StringBuilder.h
@@ -81,7 +81,7 @@ private:
     u8* data() { return m_buffer.data(); }
     u8 const* data() const { return m_buffer.data(); }
 
-    static constexpr size_t inline_capacity = 128;
+    static constexpr size_t inline_capacity = 256;
     AK::Detail::ByteBuffer<inline_capacity> m_buffer;
 };