diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
index 363cd690f..b2b71ea7d 100644
--- a/.github/workflows/build-macos.yml
+++ b/.github/workflows/build-macos.yml
@@ -35,7 +35,7 @@ jobs:
       - name: Install (macOS)
         if: runner.os == 'macOS'
         run: |
-          brew install cmake ninja boost
+          brew install cmake ninja boost@1.60
           if [ "${{ matrix.compiler }}" = "gcc" ]; then
             brew install gcc@${{ matrix.version }}
             echo "::set-env name=CC::gcc-${{ matrix.version }}"
@@ -48,4 +48,4 @@ jobs:
       - name: Build and Test (macOS)
         if: runner.os == 'macOS'
         run: |
-          bash .github/scripts/unix.sh -t
\ No newline at end of file
+          bash .github/scripts/unix.sh -t
diff --git a/.github/workflows/build-python.yml b/.github/workflows/build-python.yml
index fbec491f2..6c90b8bf7 100644
--- a/.github/workflows/build-python.yml
+++ b/.github/workflows/build-python.yml
@@ -87,7 +87,7 @@ jobs:
       - name: Install (macOS)
         if: runner.os == 'macOS'
         run: |
-          brew install cmake ninja boost
+          brew install cmake ninja boost@1.60
           if [ "${{ matrix.compiler }}" = "gcc" ]; then
             brew install gcc@${{ matrix.version }}
             echo "::set-env name=CC::gcc-${{ matrix.version }}"
@@ -109,4 +109,4 @@ jobs:
       - name: Build (macOS)
         if: runner.os == 'macOS'
         run: |
-          bash .github/scripts/python.sh
\ No newline at end of file
+          bash .github/scripts/python.sh