diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56783dd6..abc2d0ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,28 @@ Acronyms:
 
 **Bolded text highlights its importance.**
 
+## [3.3.1] - 2023-02-11
+
+[4807915](https://github.com/BITNP/BIThesis/commit/480791527043e2ccc706d688cacd0cbbde87d9a3)...[a87c4f6](https://github.com/BITNP/BIThesis/commit/a87c4f6aa450c93ef1e0b49f638262c6aa3482f6)
+
+### Bug Fixes
+
+- Increase Indent. ([25f87cc](https://github.com/BITNP/BIThesis/commit/25f87cc5db42506dae43e66b4abbb99143c074de))
+- Set font by font file names (in stead of font names). ([21826b0](https://github.com/BITNP/BIThesis/commit/21826b01e72bf36c8823295070666efcd5137e72))
+- Chapters now `openany` in twoside mode. ([a2047ff](https://github.com/BITNP/BIThesis/commit/a2047ff0124c3695f6e1745357ed584d45d4f2c5))
+
+### Documentation
+
+- Add apecial thanks. ([af0ecca](https://github.com/BITNP/BIThesis/commit/af0ecca7c429b996d7cc06f40b42658495eb9b95))
+
+### Miscellaneous Tasks
+
+- Bump version to v3.3.1 ([2f4aa62](https://github.com/BITNP/BIThesis/commit/2f4aa62f8efcfe9c46b5b2e78d1cbed3a5fbc11d))
+
+### Hotfix
+
+- \clearpage after remove \cleardoublepage. ([ea1a689](https://github.com/BITNP/BIThesis/commit/ea1a689637a7ff7ae5850965245ed24df0e1854e))
+
 ## [3.3.0] - 2023-02-02
 
 [7b4bd2d](https://github.com/BITNP/BIThesis/commit/7b4bd2d0c445b91c13ff23d159c98c29540e59f7)...[694c3b3](https://github.com/BITNP/BIThesis/commit/694c3b348ff91364de9a094681ad2cb1ed974847)
diff --git a/bithesis.dtx b/bithesis.dtx
index bc8cbd78..71252d8e 100644
--- a/bithesis.dtx
+++ b/bithesis.dtx
@@ -21,7 +21,7 @@
 %<thesis>\ProvidesExplClass{bithesis}
 %<report>\ProvidesExplClass{bitreport}
 %<beamer>\ProvidesExplClass{bitbeamer}
-%<cls>{2023-02-02}{3.3.0}{BIT Thesis Templates}
+%<cls>{2023-02-11}{3.3.1}{BIT Thesis Templates}
 %
 %<oldcls>\NeedsTeXFormat{LaTeX2e}[2020/10/01]
 %<book>\ProvidesClass{bitbook}
@@ -30,7 +30,7 @@
 %<oldcls> [2022/05/09 v2.1.1 BIT Thesis Templates]
 %
 %<*driver>
-\ProvidesFile{bithesis.dtx}[2023/02/02 3.3.0 BIT Thesis Templates]
+\ProvidesFile{bithesis.dtx}[2023/02/11 3.3.1 BIT Thesis Templates]
 \documentclass[letterpaper]{l3doc}
 \usepackage{dtx-style}
 
diff --git a/templates/graduate-thesis/bithesis.cls b/templates/graduate-thesis/bithesis.cls
index 149089db..28f99048 100644
--- a/templates/graduate-thesis/bithesis.cls
+++ b/templates/graduate-thesis/bithesis.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bithesis}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_thesis_type_int
 \int_new:N \g__bithesis_head_zihao_int
 \bool_new:N \g__bithesis_twoside_bool
diff --git a/templates/lab-report/bitreport.cls b/templates/lab-report/bitreport.cls
index 44cb06bb..eaeeaa05 100644
--- a/templates/lab-report/bitreport.cls
+++ b/templates/lab-report/bitreport.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bitreport}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_report_type_int
 \clist_const:Nn \c__bithesis_report_type_clist
     { common, undergraduate_proposal}
diff --git a/templates/paper-translation/bithesis.cls b/templates/paper-translation/bithesis.cls
index 149089db..28f99048 100644
--- a/templates/paper-translation/bithesis.cls
+++ b/templates/paper-translation/bithesis.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bithesis}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_thesis_type_int
 \int_new:N \g__bithesis_head_zihao_int
 \bool_new:N \g__bithesis_twoside_bool
diff --git a/templates/presentation-slide/bitbeamer.cls b/templates/presentation-slide/bitbeamer.cls
index 62d0a481..4ea80f2a 100644
--- a/templates/presentation-slide/bitbeamer.cls
+++ b/templates/presentation-slide/bitbeamer.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bitbeamer}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \keys_define:nn { bitbeamer }
   {
     titlegraphic .tl_set:N = \l_bit_titlegraphic_tl,
diff --git a/templates/undergraduate-proposal-report/bitreport.cls b/templates/undergraduate-proposal-report/bitreport.cls
index 44cb06bb..eaeeaa05 100644
--- a/templates/undergraduate-proposal-report/bitreport.cls
+++ b/templates/undergraduate-proposal-report/bitreport.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bitreport}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_report_type_int
 \clist_const:Nn \c__bithesis_report_type_clist
     { common, undergraduate_proposal}
diff --git a/templates/undergraduate-thesis-en/bithesis.cls b/templates/undergraduate-thesis-en/bithesis.cls
index 149089db..28f99048 100644
--- a/templates/undergraduate-thesis-en/bithesis.cls
+++ b/templates/undergraduate-thesis-en/bithesis.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bithesis}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_thesis_type_int
 \int_new:N \g__bithesis_head_zihao_int
 \bool_new:N \g__bithesis_twoside_bool
diff --git a/templates/undergraduate-thesis/bithesis.cls b/templates/undergraduate-thesis/bithesis.cls
index 149089db..28f99048 100644
--- a/templates/undergraduate-thesis/bithesis.cls
+++ b/templates/undergraduate-thesis/bithesis.cls
@@ -27,7 +27,7 @@
 %% 
 \RequirePackage{expl3,l3keys2e}
 \ProvidesExplClass{bithesis}
-{2023-02-02}{3.3.0}{BIT Thesis Templates}
+{2023-02-11}{3.3.1}{BIT Thesis Templates}
 \int_new:N \g__bithesis_thesis_type_int
 \int_new:N \g__bithesis_head_zihao_int
 \bool_new:N \g__bithesis_twoside_bool