diff --git a/.github/workflows/Release.yml b/.github/workflows/Release.yml
index 3a2468ce..3a3f46e5 100644
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -35,6 +35,61 @@ jobs:
         run: scripts/darwin/install.sh
       - name: Build project
         run: scripts/darwin/build.sh
+      - name: Codesign app bundle
+        if: "! github.event.pull_request.head.repo.fork " # not running on a fork
+        # Extract the secrets we defined earlier as environment variables
+        env:
+          MACOS_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
+          MACOS_CERTIFICATE_PWD: ${{ secrets.P12_PASSWORD }}
+          MACOS_CERTIFICATE_NAME: ${{ secrets.APPLE_CERTIFICATE_NAME }}
+          MACOS_CI_KEYCHAIN_PWD: ${{ secrets.KEYCHAIN_PASSWORD }}
+        run: |
+          # Turn our base64-encoded certificate back to a regular .p12 file
+
+          echo $MACOS_CERTIFICATE | base64 --decode > certificate.p12
+          # We need to create a new keychain, otherwise using the certificate will prompt
+          # with a UI dialog asking for the certificate password, which we can't
+          # use in a headless CI environment
+
+          security create-keychain -p "$MACOS_CI_KEYCHAIN_PWD" build.keychain 
+          security default-keychain -s build.keychain
+          security unlock-keychain -p "$MACOS_CI_KEYCHAIN_PWD" build.keychain
+          security import certificate.p12 -k build.keychain -P "$MACOS_CERTIFICATE_PWD" -T /usr/bin/codesign
+          security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "$MACOS_CI_KEYCHAIN_PWD" build.keychain
+
+          # We finally codesign our app bundle, specifying the Hardened runtime option
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/Frameworks/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/Resources/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/bearer/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents//PlugIns/iconengines/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/imageformats/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/platforminputcontexts/*
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/platforms/*
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/printsupport/*
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/styles/*
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/PlugIns/virtualkeyboard/* 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/MacOS/plugins/*
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/MacOS/dlt-commander 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app/Contents/MacOS/dlt-viewer 
+          /usr/bin/codesign --timestamp --options=runtime -s "$MACOS_CERTIFICATE_NAME" -f -v /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app
+      - name: Notarize app bundle
+        if: "! github.event.pull_request.head.repo.fork " # not running on a fork
+        env:
+          PROD_MACOS_NOTARIZATION_APPLE_ID: ${{ secrets.APPLE_ID }}
+          PROD_MACOS_NOTARIZATION_TEAM_ID: ${{ secrets.TEAM_ID }}
+          PROD_MACOS_NOTARIZATION_PWD: ${{ secrets.APP_PASSWORD }}
+        run: |
+          echo "Create keychain profile"
+          xcrun notarytool store-credentials "notarytool-profile" --apple-id "$PROD_MACOS_NOTARIZATION_APPLE_ID" --team-id "$PROD_MACOS_NOTARIZATION_TEAM_ID" --password "$PROD_MACOS_NOTARIZATION_PWD"
+          echo "Creating temp notarization archive"
+          ditto -c -k --keepParent "/Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app" "/Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.zip"
+
+          echo "Notarize app"
+          xcrun notarytool submit "/Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.zip" --keychain-profile "notarytool-profile" --wait
+
+          echo "Attach staple"
+          xcrun stapler staple "/Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.app"
+          rm -r /Users/runner/work/dlt-viewer/dlt-viewer/build/install/DLTViewer.zip
       - name: Artifact Creation
         run: |
           cd /Users/runner/work/dlt-viewer/dlt-viewer/build