diff --git a/update-version.sh b/update-version.sh
new file mode 100755
index 00000000..3b1959a2
--- /dev/null
+++ b/update-version.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+tmpfile=$(mktemp)
+old_version=$1
+new_version=$2
+
+if [ "$old_version" = "" ] || [ "$new_version" = "" ]; then
+    echo "Error: Specify both the old version number and the new version number" > /dev/stderr
+    exit 1
+fi
+
+function update_versions_in_file()
+{
+    cat $1 | sed -e "s/$old_version/$new_version/g" > $tmpfile
+    cp $tmpfile $1
+}
+
+# replace version strings
+update_versions_in_file configure.ac
+update_versions_in_file README.md
+update_versions_in_file README_JP.md
+update_versions_in_file libcobj/app/build.gradle.kts
+update_versions_in_file libcobj/app/src/main/java/jp/osscons/opensourcecobol/libcobj/Const.java
+update_versions_in_file tests/command-line-options.src/info-java-dir.at
+
+# Rebuild
+autoreconf
+./configure --prefix=/usr/
+make