diff --git a/.github/workflows/build_and_test_library.yml b/.github/workflows/build_and_test_library.yml
index 1357696..7da3a7c 100644
--- a/.github/workflows/build_and_test_library.yml
+++ b/.github/workflows/build_and_test_library.yml
@@ -56,14 +56,14 @@ jobs:
       if: startsWith(matrix.os, 'macos') || startsWith(matrix.os, 'ubuntu')
       run: |
         mkdir -p "${{github.workspace}}/build"
-        curl -L ${{env.ZETA_TARBALL_URL}} | xz -cd | tar -C "${{github.workspace}}/build" --strip-components=2 -xvf - Zeta/API/Z
+        curl -L "${{env.ZETA_TARBALL_URL}}" | xz -cd | tar -C "${{github.workspace}}/build" --strip-components=2 -xvf - Zeta/API/Z
 
     - name: Install dependencies (Windows)
       if: startsWith(matrix.os, 'windows')
       shell: cmd
       run: |
         mkdir "${{github.workspace}}\build"
-        curl -L ${{env.ZETA_TARBALL_URL}} | 7z x -txz -si -so | 7z x -si -ttar -o"${{github.workspace}}\build" Zeta/API/Z
+        curl -L "${{env.ZETA_TARBALL_URL}}" | 7z x -txz -si -so | 7z x -si -ttar -o"${{github.workspace}}\build" Zeta/API/Z
 
     - name: Configure CMake
       run: >-
diff --git a/.github/workflows/build_documentation.yml b/.github/workflows/build_documentation.yml
index c51545e..cb84383 100644
--- a/.github/workflows/build_documentation.yml
+++ b/.github/workflows/build_documentation.yml
@@ -47,7 +47,7 @@ jobs:
     - name: Install dependencies
       run: |
         mkdir -p "${{github.workspace}}/build"
-        curl -L ${{env.ZETA_TARBALL_URL}} | xz -cd | tar -C "${{github.workspace}}/build" --strip-components=2 -xvf - Zeta/API/Z
+        curl -L "${{env.ZETA_TARBALL_URL}}" | xz -cd | tar -C "${{github.workspace}}/build" --strip-components=2 -xvf - Zeta/API/Z
 
     - name: Configure CMake
       run: >-