diff --git a/Doxyfile b/Doxyfile
index 3a66c141f..2df76d8c3 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -48,7 +48,7 @@ PROJECT_NAME           = mruby
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 3.2.0
+PROJECT_NUMBER         = 3.3.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/README.md b/README.md
index ed3d9302e..21ee55c6f 100644
--- a/README.md
+++ b/README.md
@@ -30,12 +30,10 @@ of the Ministry of Economy, Trade and Industry of Japan.
 
 ## How to get mruby
 
-To get mruby, you can download the stable version 3.2.0 from the official mruby
+To get mruby, you can download the stable version 3.3.0 from the official mruby
 GitHub repository or clone the trunk of the mruby source tree with the "git
 clone" command. You can also install and compile mruby using [ruby-install](https://github.com/postmodern/ruby-install), [ruby-build](https://github.com/rbenv/ruby-build) or [rvm](https://github.com/rvm/rvm).
 
-The stable version 3.2.0 of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/archive/3.2.0.zip](https://github.com/mruby/mruby/archive/3.2.0.zip)
-
 The latest development version of mruby can be downloaded via the following URL: [https://github.com/mruby/mruby/zipball/master](https://github.com/mruby/mruby/zipball/master)
 
 The trunk of the mruby source tree can be checked out with the
diff --git a/doc/guides/debugger.md b/doc/guides/debugger.md
index dba9fb57d..4e52b7b8b 100644
--- a/doc/guides/debugger.md
+++ b/doc/guides/debugger.md
@@ -38,7 +38,7 @@ To confirm mrdb was installed properly, run mrdb with the `--version` option:
 
 ```bash
 $ mrdb --version
-mruby 3.2.0 (2023-02-24)
+mruby 3.3.0 (2024-02-14)
 ```
 
 ## 2.2 Basic Operation
diff --git a/include/mruby/version.h b/include/mruby/version.h
index c2fc83d87..2562603c7 100644
--- a/include/mruby/version.h
+++ b/include/mruby/version.h
@@ -27,7 +27,7 @@ MRB_BEGIN_DECL
 /*
  * The version of Ruby used by mruby.
  */
-#define MRUBY_RUBY_VERSION "3.2"
+#define MRUBY_RUBY_VERSION "3.3"
 
 /*
  * Ruby engine.
@@ -42,7 +42,7 @@ MRB_BEGIN_DECL
 /*
  * Minor release version number.
  */
-#define MRUBY_RELEASE_MINOR 2
+#define MRUBY_RELEASE_MINOR 3
 
 /*
  * Tiny release version number.
@@ -80,7 +80,7 @@ MRB_BEGIN_DECL
 /*
  * Release year.
  */
-#define MRUBY_RELEASE_YEAR 2023
+#define MRUBY_RELEASE_YEAR 2024
 
 /*
  * Release month.
@@ -90,7 +90,7 @@ MRB_BEGIN_DECL
 /*
  * Release day.
  */
-#define MRUBY_RELEASE_DAY 24
+#define MRUBY_RELEASE_DAY 14
 
 /*
  * Release date as a string.