diff --git a/.github/workflows/auto-update-core.yml b/.github/workflows/auto-update-core.yml
index 6dd6e80a..74370d42 100644
--- a/.github/workflows/auto-update-core.yml
+++ b/.github/workflows/auto-update-core.yml
@@ -20,6 +20,29 @@ jobs:
       - name: Setup Repo
         uses: ./tools/github/setup-repo
 
+      # The SDK dispatches right after publishing, before npm serves the new versions.
+      - name: Wait for published versions on npm
+        shell: bash
+        env:
+          PACKAGES: ${{ toJson(github.event.client_payload.packages) }}
+        run: |
+          for row in $(echo "$PACKAGES" | jq -c '.[]'); do
+            PKG=$(echo "$row" | jq -r '.name')
+            VER=$(echo "$row" | jq -r '.version')
+
+            for attempt in $(seq 1 10); do
+              if [ "$(npm view "$PKG@$VER" version 2>/dev/null)" = "$VER" ]; then
+                echo "✅ $PKG@$VER is available"
+                continue 2
+              fi
+              echo "⏳ $PKG@$VER not on npm yet (attempt $attempt/10)"
+              sleep 30
+            done
+
+            echo "::error::$PKG@$VER was not available on npm after 5 minutes"
+            exit 1
+          done
+
       - name: Update @swapkit/* dependencies
         shell: bash
         run: |