diff --git a/Satyristes b/Satyristes
index ce03016..696c925 100644
--- a/Satyristes
+++ b/Satyristes
@@ -3,7 +3,7 @@
 
 (library
   (name "class-exdesign")
-  (version "0.2")
+  (version "0.3.1")
   (sources
     ((package "article-ja.satyg" "article-ja.satyg")
      (package "exdesign.satyh" "exdesign.satyh")))
@@ -15,7 +15,7 @@
 
 (libraryDoc
   (name "class-exdesign-doc")
-  (version "0.2")
+  (version "0.3.1")
   (workingDirectory "doc")
   (build
     ((satysfi "manual.saty" "-o" "manual.pdf")))
diff --git a/article-ja.satyg b/article-ja.satyg
index bd7da1d..e5940be 100644
--- a/article-ja.satyg
+++ b/article-ja.satyg
@@ -1,7 +1,7 @@
 %UTF-8
 %(c) Naoki Kaneko 2018-2021
 %https://github.com/puripuri2100/exdesign
-%v0.3
+%0.3.1
 
 @import: exdesign
 
diff --git a/doc/manual.saty b/doc/manual.saty
index 2b59cd0..c4b7ea0 100644
--- a/doc/manual.saty
+++ b/doc/manual.saty
@@ -6,7 +6,7 @@
 @require: itemize
 
 document (|
-        title = {ExDesignパッケージ v0.3};
+        title = {ExDesignパッケージ v0.3.1};
         author = {Naoki Kaneko (puripuri2100)};
         date = {2021/05/22};
         show-title = true;
diff --git a/exdesign.satyh b/exdesign.satyh
index aec4dd5..2720921 100644
--- a/exdesign.satyh
+++ b/exdesign.satyh
@@ -1,7 +1,7 @@
 %UTF-8
 %(c) Naoki Kaneko and T. Suwa  2018-2021
 %https://github.com/puripuri2100/exdesign
-%v0.3
+%0.3.1
 
 @require: math
 @require: list
diff --git a/readme.md b/readme.md
index fe63512..8ce4c2b 100644
--- a/readme.md
+++ b/readme.md
@@ -60,6 +60,7 @@ stdjaを使用するのに対して、`style`・`design`・`header-footer`・`fo
 - 2018/11/11 v0.1
 - 2018/11/18 v0.2
 - 2021/05/22 v0.3
+- 2021/05/22 0.3.1
 
 ---
 
diff --git a/satysfi-class-exdesign-doc.opam b/satysfi-class-exdesign-doc.opam
index 9b2505f..2d764b0 100644
--- a/satysfi-class-exdesign-doc.opam
+++ b/satysfi-class-exdesign-doc.opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 name: "satysfi-class-exdesign-doc"
-version: "0.3.0"
+version: "0.3.1"
 synopsis: "Documentation: A class file easy to customize with SATySFi"
 description: """Documentation: A class file easy to customize with SATySFi."""
 
diff --git a/satysfi-class-exdesign.opam b/satysfi-class-exdesign.opam
index d7fe932..240d312 100644
--- a/satysfi-class-exdesign.opam
+++ b/satysfi-class-exdesign.opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 name: "satysfi-class-exdesign"
-version: "0.3.0"
+version: "0.3.1"
 synopsis: "A class file easy to customize with SATySFi"
 description: """A class file easy to customize with SATySFi."""