diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 033ae3d0..0f4335c2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,6 +30,14 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Run UPX against portable version
+        uses: crazy-max/ghaction-upx@v3
+        with:
+          version: latest
+          files: |
+            ./src-tauri/target/release/omp-launcher.exe
+          args: -9 -fq
+
       - name: Generate artifact name
         id: vars
         shell: bash