diff --git a/.jenkins_osx b/.jenkins_osx
index 87b12d6a..59a5b99b 100644
--- a/.jenkins_osx
+++ b/.jenkins_osx
@@ -36,7 +36,7 @@ pipeline {
       steps {
         retry(2) {
           sleep time: 5, unit: 'SECONDS'
-          cmake arguments: '--build . -j 4', installation: 'InSearchPath', workingDir: 'build'
+          cmake arguments: '--build . -j 3', installation: 'InSearchPath', workingDir: 'build'
         }
       }
     }