diff --git a/.github/workflows/build-linux-gcc.yml b/.github/workflows/build-linux-gcc.yml
index 7361ac5f9..214d436c3 100644
--- a/.github/workflows/build-linux-gcc.yml
+++ b/.github/workflows/build-linux-gcc.yml
@@ -41,6 +41,7 @@ jobs:
 
             - name: Install Linux Dependencies
               run: |
+                sudo apt-get install ninja-build
                 ninja --version
                 cmake --version
                 gcc --version
diff --git a/.github/workflows/build-macos-clang.yml b/.github/workflows/build-macos-clang.yml
index 97a189810..4ceb32b78 100644
--- a/.github/workflows/build-macos-clang.yml
+++ b/.github/workflows/build-macos-clang.yml
@@ -38,6 +38,7 @@ jobs:
 
             - name: Install MacOSX Dependencies
               run: |
+                brew install ninja
                 ninja --version
                 cmake --version