diff --git a/.github/workflows/macos-linux-conda.yml b/.github/workflows/macos-linux-conda.yml
index 9d87ed95f950d568c0700f19e446ceada073ac8a..e4821726115e405ec5784ef314c13018abfae127 100644
--- a/.github/workflows/macos-linux-conda.yml
+++ b/.github/workflows/macos-linux-conda.yml
@@ -102,7 +102,7 @@ jobs:
           -DGENERATE_PYTHON_STUBS=ON \
           -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
           -DCMAKE_CXX_FLAGS=${{ matrix.cxx_options }}
-        cmake --build . -j4
+        cmake --build . -j3
         ctest --output-on-failure
         cmake --install .
 
diff --git a/.github/workflows/windows-conda.yml b/.github/workflows/windows-conda.yml
index 81a4da77f9d33d2ebc3d3543c946c3c9789c5d1a..150edd51ae160928bcbe66fbbd2e3dd44069d41a 100644
--- a/.github/workflows/windows-conda.yml
+++ b/.github/workflows/windows-conda.yml
@@ -79,7 +79,7 @@ jobs:
         if errorlevel 1 exit 1
 
         :: Build
-        cmake --build . -j4
+        cmake --build . -j3
         if errorlevel 1 exit 1
 
         :: Testing