diff --git a/common/playbooks/accounting.yaml b/common/playbooks/accounting.yaml
index 53d4cf8a94c5d6e818bb5a95202002bf2e059818..a835caabb124d5d69e37de56f61a1187f7cf10cb 100644
--- a/common/playbooks/accounting.yaml
+++ b/common/playbooks/accounting.yaml
@@ -1,5 +1,5 @@
 - name: EOSC accounting deployment
-  hosts: master
+  hosts: master[0]
   become: true
   tasks:
     - name: Configure helm repo
diff --git a/common/playbooks/k8s.yaml b/common/playbooks/k8s.yaml
index 090047fe8af4e022fdd88979498b36d1abf138f5..fb469532f96ae8ef57cf7a80dc8a621871c4f2ce 100644
--- a/common/playbooks/k8s.yaml
+++ b/common/playbooks/k8s.yaml
@@ -249,7 +249,7 @@
 
 
 - name: K8s customization
-  hosts: master
+  hosts: master[0]
   become: true
   tasks:
     - name: Wait for helm
diff --git a/common/playbooks/notebooks.yaml b/common/playbooks/notebooks.yaml
index 893f911b102a4c11f27328c86b844b1fdbce234e..5b003a799a24ddac5d3de97bcb21bccfd36a2caf 100644
--- a/common/playbooks/notebooks.yaml
+++ b/common/playbooks/notebooks.yaml
@@ -1,6 +1,6 @@
 ---
 - name: Notebooks deployments
-  hosts: master
+  hosts: master[0]
   become: true
   tasks:
     - name: Configure helm repo
diff --git a/common/playbooks/security-logs.yaml b/common/playbooks/security-logs.yaml
index ce71315197ce2b00c78b2055fbca19b6cab8dc58..e08df2589c87c7a5aabde74512cc2213ab9446a2 100644
--- a/common/playbooks/security-logs.yaml
+++ b/common/playbooks/security-logs.yaml
@@ -33,7 +33,7 @@
 # For GELF: add self_signed.crt to authorized client certificates directory.
 #
 - name: Fluent Bit Configuration
-  hosts: master
+  hosts: master[0]
   become: true
   vars:
     namespace: fluent-bit
diff --git a/common/playbooks/security-scanner.yaml b/common/playbooks/security-scanner.yaml
index 05c59a940772c68b8120b86f5b0e95a041b0c617..0459062bd7ff7a6401eecda8adb14ea5d167085d 100644
--- a/common/playbooks/security-scanner.yaml
+++ b/common/playbooks/security-scanner.yaml
@@ -5,7 +5,7 @@
 # * deepfence_key (required)
 #
 - name: Deepfence ThreadManager Agent Deployment
-  hosts: master
+  hosts: master[0]
   become: true
   vars:
     namespace: deepfence