diff --git a/slides.pdf b/slides.pdf
index a73f794..5208c25 100644
Binary files a/slides.pdf and b/slides.pdf differ
diff --git a/theme/beamerfontthemeOUCSlide.sty b/theme/beamerfontthemeOUCSlide.sty
index 45f8bb7..18652ea 100644
--- a/theme/beamerfontthemeOUCSlide.sty
+++ b/theme/beamerfontthemeOUCSlide.sty
@@ -205,20 +205,38 @@
     {\def\insertpart{{\beameroucslide@partformatspacingb{LetterSpace=15.0}\beameroucslide@partformatcaps{\beameroucslide@partformatspacinga[120]{\expandafter\hyperlink\partlink}}}}}%
     {}%
     {\PackageError{beameroucslide}{Patching original part failed}\@ehc}
-\patchcmd{\beamer@@frametitle}
-    {{%
-        \gdef\insertframetitle{{#2\ifnum\beamer@autobreakcount>0\relax{}\space%
-        \usebeamertemplate*{frametitle continuation}\fi}}%
-        \gdef\beamer@frametitle{#2}%
-        \gdef\beamer@shortframetitle{#1}%
-    }}
-    {{%
-        \gdef\insertframetitle{{\beameroucslide@frametitleformatcaps{#2}\ifnum%
-        \beamer@autobreakcount>0\relax{}\space%
-        \usebeamertemplate*{frametitle continuation}\fi}}%
-        \gdef\beamer@frametitle{#2}%
-        \gdef\beamer@shortframetitle{#1}%
-    }}
-    {}
-    {\PackageError{beameroucslide}{Patching original frame title failed}\@ehc}
+% beamer 3.69（TeX Live 2023）起 \beamer@@frametitle 的定义发生了变化：
+%   1. 内部增加了 \ifblank 判断；
+%   2. 用 \beamer@insertframetitlecontinuation 取代了 \usebeamertemplate*{frametitle continuation}。
+% 因此这里按 beamer 版本分别处理，保证在 TeX Live 2022 与 2023 下都能编译通过。
+\@ifundefined{beamer@insertframetitlecontinuation}
+    {% 旧版 beamer（TeX Live 2022 及以前）：沿用原有的补丁方式
+        \patchcmd{\beamer@@frametitle}
+            {{%
+                \gdef\insertframetitle{{#2\ifnum\beamer@autobreakcount>0\relax{}\space%
+                \usebeamertemplate*{frametitle continuation}\fi}}%
+                \gdef\beamer@frametitle{#2}%
+                \gdef\beamer@shortframetitle{#1}%
+            }}
+            {{%
+                \gdef\insertframetitle{{\beameroucslide@frametitleformatcaps{#2}\ifnum%
+                \beamer@autobreakcount>0\relax{}\space%
+                \usebeamertemplate*{frametitle continuation}\fi}}%
+                \gdef\beamer@frametitle{#2}%
+                \gdef\beamer@shortframetitle{#1}%
+            }}
+            {}
+            {\PackageError{beameroucslide}{Patching original frame title failed}\@ehc}%
+    }
+    {% 新版 beamer（TeX Live 2023 及以后）：按新定义重写，并加入标题格式控制
+        \long\def\beamer@@frametitle[#1]#2{%
+            \ifblank{#2}{}{%
+                \gdef\insertframetitle{{\beameroucslide@frametitleformatcaps{#2}%
+                    \ifnum\beamer@autobreakcount>0\relax{}\space%
+                    \beamer@insertframetitlecontinuation\fi}}%
+                \gdef\beamer@frametitle{#2}%
+                \gdef\beamer@shortframetitle{#1}%
+            }%
+        }%
+    }
 \makeatother