diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index dc5d7454..7b6842b7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -58,6 +58,10 @@ jobs:
           key: ${{ matrix.target }}
 
       - name: Build
+        env:
+          RUSTFLAGS: ${{ startsWith(matrix.target, 'x86_64') && '-C target-cpu=x86-64-v2' || '' }}
+          CARGO_PROFILE_RELEASE_OPT_LEVEL: "3"
+          CARGO_PROFILE_RELEASE_LTO: "fat"
         run: cargo build --release --target ${{ matrix.target }}
 
       # --- macOS: import certificate and sign the binary ---