diff --git a/doc/scripts/pack.sh b/doc/scripts/pack.sh
index 9df5e9a..7d6182f 100755
--- a/doc/scripts/pack.sh
+++ b/doc/scripts/pack.sh
@@ -4,7 +4,10 @@
 
 set -e
 
-VERSION=0.4.0
+VERSION="$(sed -nr 's/^\s*version\s*=\s*"(.*)"\s*$/\1/p' Cargo.toml)"
+test -z "$VERSION" && echo 'Error: Could not extract version from Cargo.toml' && exit
+echo "Extracted version from Cargo.toml: $VERSION"
+
 TMPPATH=ZIP_TMP_PATH
 mkdir "$TMPPATH"
 cd "$TMPPATH"