diff --git a/.cirrus.yml b/.cirrus.yml
index 3a8c3871c..be6331506 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -7,11 +7,11 @@ check_task:
   - tar xfz cmake-3.20.2.tar.gz
   - cd cmake-3.20.2
   - ./configure
-  - make cmake ctest -j10
+  - make cmake ctest -j4
   - cd ..
   - mkdir build
   - cd build
   - ../cmake-3.20.2/bin/cmake .. -DJSON_FastTests=ON
-  - make -j10
+  - make -j4
   - cd tests
-  - ../../cmake-3.20.2/bin/ctest -j10
+  - ../../cmake-3.20.2/bin/ctest -j4