diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
index a8b0d75..e8d0cd0 100644
--- a/.github/workflows/build-linux.yml
+++ b/.github/workflows/build-linux.yml
@@ -41,6 +41,12 @@ jobs:
         CGO_ENABLED: 1
         GOAMD64: v1
 
+    - name: Compress with upx
+      run: |
+        wget -O upx.tar.xz https://github.com/upx/upx/releases/download/v5.0.2/upx-5.0.2-amd64_linux.tar.xz
+        tar -xf upx.tar.xz
+        upx-5.0.2-amd64_linux/upx --lzma src/Picocrypt
+
     - name: Package as .deb
       run: |
         wget https://github.com/user-attachments/files/16136712/Picocrypt.zip
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 5b491c8..6928f2a 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -62,7 +62,7 @@ jobs:
       run: |
         Invoke-WebRequest -OutFile upx.zip https://github.com/user-attachments/files/15894908/upx-4.2.4-win64.zip
         Expand-Archive -DestinationPath upx upx.zip
-        upx/upx-4.2.4-win64/upx.exe --lzma --brute -o src/Picocrypt.exe src/5.exe
+        upx/upx-4.2.4-win64/upx.exe --lzma -o src/Picocrypt.exe src/5.exe
 
     - name: Upload artifact
       uses: actions/upload-artifact@v4
diff --git a/.github/workflows/pr-test-build-linux.yml b/.github/workflows/pr-test-build-linux.yml
index 2542dcd..653830b 100644
--- a/.github/workflows/pr-test-build-linux.yml
+++ b/.github/workflows/pr-test-build-linux.yml
@@ -38,6 +38,12 @@ jobs:
         CGO_ENABLED: 1
         GOAMD64: v1
 
+    - name: Compress with upx
+      run: |
+        wget -O upx.tar.xz https://github.com/upx/upx/releases/download/v5.0.2/upx-5.0.2-amd64_linux.tar.xz
+        tar -xf upx.tar.xz
+        upx-5.0.2-amd64_linux/upx --lzma src/Picocrypt
+
     - name: Package as .deb
       run: |
         wget https://github.com/user-attachments/files/16136712/Picocrypt.zip
diff --git a/.github/workflows/pr-test-build-windows.yml b/.github/workflows/pr-test-build-windows.yml
index 44bb4da..6ce862e 100644
--- a/.github/workflows/pr-test-build-windows.yml
+++ b/.github/workflows/pr-test-build-windows.yml
@@ -59,7 +59,7 @@ jobs:
       run: |
         Invoke-WebRequest -OutFile upx.zip https://github.com/user-attachments/files/15894908/upx-4.2.4-win64.zip
         Expand-Archive -DestinationPath upx upx.zip
-        upx/upx-4.2.4-win64/upx.exe --lzma --brute -o src/Picocrypt.exe src/5.exe
+        upx/upx-4.2.4-win64/upx.exe --lzma -o src/Picocrypt.exe src/5.exe
 
     - name: Upload artifact
       uses: actions/upload-artifact@v4