diff --git a/.github/workflows/npm.yml b/.github/workflows/npm.yml
index 68505732..248c4adf 100644
--- a/.github/workflows/npm.yml
+++ b/.github/workflows/npm.yml
@@ -7,9 +7,15 @@ on:
   push:
     tags:
       - "v*.*.*"
+  pull_request:
+    paths:
+      - 'solidity/**.sol'
+      - 'solidity/package.json'
+      - 'solidity/release.sh'
+      - '.github/workflows/npm.yml'
 
 jobs:
-  build:
+  release:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -17,8 +23,15 @@ jobs:
         with:
           node-version: 18
           registry-url: https://registry.npmjs.org/
-      - run: |
+
+      - name: Set ENV
+        id: env
+        if: github.event_name != 'pull_request'
+        run: echo "NODE_AUTH_TOKEN=${{secrets.NPM_TOKEN}}" >> $GITHUB_ENV
+
+      - name: Release
+        run: |
           chmod +x ./solidity/release.sh
           ./solidity/release.sh
         env:
-          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
\ No newline at end of file
+          NODE_AUTH_TOKEN: ${{ steps.env.outputs.NODE_AUTH_TOKEN }}
\ No newline at end of file
diff --git a/solidity/release.sh b/solidity/release.sh
index dc4c2566..814d4638 100755
--- a/solidity/release.sh
+++ b/solidity/release.sh
@@ -15,6 +15,13 @@ if [ -d "$project_dir/solidity" ]; then
   solidity_dir="$project_dir/solidity"
 fi
 
+package_name=$(jq -r '.name' "$solidity_dir/package.json")
+last_version=$(npm info "$package_name" version)
+latest_version=$(jq -r '.version' "$solidity_dir/package.json")
+if [ "$last_version" == "$latest_version" ]; then
+  echo "The latest version of $package_name is already published." && exit 0
+fi
+
 if [ ! -f "$solidity_dir/hardhat.config.ts" ]; then
   echo "This script must be run from the root of the repository." && exit 1
 fi
@@ -42,5 +49,9 @@ done
 # publish contracts package
 (
   cd "$solidity_dir/contracts"
-  npm publish --access public
+  if [ -z "$NODE_AUTH_TOKEN" ]; then
+    npm publish --dry-run
+  else
+    npm publish --access public
+  fi
 )