diff --git a/release.sh b/release.sh
index 1047646..40b930f 100755
--- a/release.sh
+++ b/release.sh
@@ -2,6 +2,22 @@
 set -e
 cd "$(dirname "$0")"
 
+if [ -n "$(git status --porcelain)" ]; then
+  echo "Uncommitted changes"
+  exit 1
+fi
+
+if [[ ! "$1" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  echo "Invalid version '$1'";
+  exit 1;
+fi
+
+# Update package version
+contents="$(jq ".version = \"$1\"" package.json)"
+echo -E "${contents}" > package.json
+pnpm i
+git add package.json pnpm-lock.yaml
+
 CHANGELOG="CHANGELOG.md"
 
 VERSION=$(jq -r '.version' package.json)
@@ -20,7 +36,7 @@ fi
 
 editor "$CHANGELOG"
 
-git add package.json "$CHANGELOG"
+git add "$CHANGELOG"
 git commit -m "chore(release): release v$VERSION"
 
 awk 'BEGIN{RS="(^|\n)## [^\n]+\n*"} NR==2 { print }' "$CHANGELOG" | git tag -as -F - --cleanup whitespace "$TAG"