diff --git a/README.md b/README.md
index 5b14d664c..91bc6528d 100644
--- a/README.md
+++ b/README.md
@@ -99,7 +99,7 @@ Procedures for each standard are provided by the following R7RS-style libraries:
 cmake -B build -DCMAKE_BUILD_TYPE=Release
 cd build
 make package
-sudo apt install build/meevax_0.4.826_amd64.deb
+sudo apt install build/meevax_0.5.0_amd64.deb
 ```
 
 or
@@ -131,9 +131,9 @@ sudo rm -rf /usr/local/share/meevax
 
 | Target Name | Description
 |-------------|-------------
-| `all`       | Build shared-library `libmeevax.0.4.826.so` and executable `meevax`
+| `all`       | Build shared-library `libmeevax.0.5.0.so` and executable `meevax`
 | `test`      | Test executable `meevax`
-| `package`   | Generate debian package `meevax_0.4.826_amd64.deb`
+| `package`   | Generate debian package `meevax_0.5.0_amd64.deb`
 | `install`   | Copy files into `/usr/local` directly
 
 ## Usage
diff --git a/VERSION b/VERSION
index 5ab8ef68b..8f0916f76 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.4.826
+0.5.0
diff --git a/script/update.sh b/script/update.sh
index c310c5152..a1d92b6f3 100755
--- a/script/update.sh
+++ b/script/update.sh
@@ -11,7 +11,7 @@ build()
   cmake --build "$1/build" --target develop
 }
 
-echo "0.4.$(($(git rev-list --no-merges --count HEAD) - 2854))" > "$root/VERSION"
+echo "0.5.$(($(git rev-list --no-merges --count HEAD) - 3681))" > "$root/VERSION"
 
 if dpkg --status meevax
 then