diff --git a/hello-nextflow/hello-modules/nextflow.config b/hello-nextflow/hello-modules/nextflow.config
index b85b316b..46bc2d83 100644
--- a/hello-nextflow/hello-modules/nextflow.config
+++ b/hello-nextflow/hello-modules/nextflow.config
@@ -44,7 +44,7 @@ process {
     memory = 2.GB
     // allocations for a specific process
     withName: 'GATK_JOINTGENOTYPING' {
-        cpus = 8
+        cpus = 4
     }
 }
 
diff --git a/hello-nextflow/hello-nf-test/nextflow.config b/hello-nextflow/hello-nf-test/nextflow.config
index c15e38d5..58a16e19 100644
--- a/hello-nextflow/hello-nf-test/nextflow.config
+++ b/hello-nextflow/hello-nf-test/nextflow.config
@@ -47,7 +47,7 @@ process {
     memory = 2.GB
     // allocations for a specific process
     withName: 'GATK_JOINTGENOTYPING' {
-        cpus = 8
+        cpus = 4
     }
 }
 
diff --git a/hello-nextflow/solutions/hello-config/4-nextflow.config b/hello-nextflow/solutions/hello-config/4-nextflow.config
index 86d38f89..5cb2778f 100644
--- a/hello-nextflow/solutions/hello-config/4-nextflow.config
+++ b/hello-nextflow/solutions/hello-config/4-nextflow.config
@@ -28,6 +28,6 @@ process {
     memory = 2.GB
     // allocations for a specific process
     withName: 'GATK_JOINTGENOTYPING' {
-        cpus = 8
+        cpus = 4
     }
 }
diff --git a/hello-nextflow/solutions/hello-config/5-nextflow.config b/hello-nextflow/solutions/hello-config/5-nextflow.config
index b901560e..150bff59 100644
--- a/hello-nextflow/solutions/hello-config/5-nextflow.config
+++ b/hello-nextflow/solutions/hello-config/5-nextflow.config
@@ -41,7 +41,7 @@ process {
     memory = 2.GB
     // allocations for a specific process
     withName: 'GATK_JOINTGENOTYPING' {
-        cpus = 8
+        cpus = 4
     }
 }