diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index 9bee284e5..f6a0644d9 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -320,7 +320,12 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
+
+      - name: Install gmp (MacOS)
+        run: brew install gmp
+
       - uses: dtolnay/rust-toolchain@stable
+
       - name: Prepare for coverage
         if: matrix.os == 'ubuntu-latest'
         run: |
@@ -328,6 +333,7 @@ jobs:
           echo "RUSTFLAGS=-Cinstrument-coverage" >> "$GITHUB_ENV"
           echo "LLVM_PROFILE_FILE=$(pwd)/target/chia_rs-%p-%m.profraw" >> "$GITHUB_ENV"
           echo "CARGO_TARGET_DIR=$(pwd)/target" >> "$GITHUB_ENV"
+
       - name: cargo test (not windows)
         if: matrix.os != 'windows-latest'
         run: cargo test --workspace --all-features