diff --git a/tools/continuous_build/build_internal/masters/master.tryserver.webrtc/master.cfg b/tools/continuous_build/build_internal/masters/master.tryserver.webrtc/master.cfg
index 36d6934bf..40790c854 100755
--- a/tools/continuous_build/build_internal/masters/master.tryserver.webrtc/master.cfg
+++ b/tools/continuous_build/build_internal/masters/master.tryserver.webrtc/master.cfg
@@ -143,13 +143,13 @@ linux_builder_release = {
     }
 mac_builder_debug = {
     'name': 'mac',
-    'slavename': 'dhcp-172-28-249-242',
+    'slavename': 'dhcp-172-28-249-129',
     'builddir': 'mac-trybot-1',
     'factory': mac_factory_dbg,
     }
 mac_builder_release = {
     'name': 'mac_rel',
-    'slavename': 'dhcp-172-28-249-244',
+    'slavename': 'dhcp-172-28-249-145',
     'builddir': 'mac-trybot-2',
     'factory': mac_factory_release,
     }
diff --git a/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg b/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
index 236f9a44b..5d6c50a2b 100755
--- a/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
+++ b/tools/continuous_build/build_internal/masters/master.webrtc/master.cfg
@@ -252,13 +252,13 @@ linux_builder_32_debug = {
       }
 mac_builder_32_debug = {
       'name': 'MacOS32DBG',
-      'slavename': 'dhcp-172-28-249-243',
+      'slavename': 'dhcp-172-28-249-144',
       'builddir': 'mac-slave-3',
       'factory': mac_factory_32_dbg,
       }
 mac_builder_32_release = {
       'name': 'MacOS32Release',
-      'slavename': 'dhcp-172-28-249-241',
+      'slavename': 'dhcp-172-28-249-167',
       'builddir': 'mac-slave-2',
       'factory': mac_factory_32_release,
       }