diff --git a/configure.ac b/configure.ac
index ac9759a..000f0a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,9 @@
 AC_PREREQ([2.65])
-AC_INIT([glorytun], [0.0.12], [https://github.com/angt/glorytun/issues],
-        [glorytun], [https://github.com/angt/glorytun])
+AC_INIT([glorytun],
+        [m4_esyscmd([./version.sh])],
+        [https://github.com/angt/glorytun/issues],
+        [glorytun],
+        [https://github.com/angt/glorytun])
 AC_CONFIG_SRCDIR([src/common.h])
 AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([1.9 -Wall -Werror foreign tar-ustar subdir-objects])
diff --git a/version.sh b/version.sh
new file mode 100755
index 0000000..434230e
--- /dev/null
+++ b/version.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+[ -z "${VERSION}" ] && VERSION=`git describe --tags --always 2>/dev/null` \
+                    && VERSION=${VERSION#v}
+
+[ -z "${VERSION}" ] && VERSION=`basename \`pwd\`` \
+                    && VERSION=${VERSION#*-}
+
+echo -n ${VERSION}