diff --git a/apache/server/site/aodh.yml b/apache/server/site/aodh.yml
index abeb151..9646e4c 100644
--- a/apache/server/site/aodh.yml
+++ b/apache/server/site/aodh.yml
@@ -10,7 +10,6 @@
   apache:
     server:
       enabled: true
-      default_mpm: event
       modules:
         - wsgi
       site:
diff --git a/apache/server/site/barbican.yml b/apache/server/site/barbican.yml
index efa1ffd..34ad44d 100644
--- a/apache/server/site/barbican.yml
+++ b/apache/server/site/barbican.yml
@@ -8,7 +8,6 @@
   apache:
     server:
       enabled: true
-      default_mpm: event
       modules:
         - wsgi
       site:
diff --git a/apache/server/site/gnocchi.yml b/apache/server/site/gnocchi.yml
index 785f6f2..3be97e1 100644
--- a/apache/server/site/gnocchi.yml
+++ b/apache/server/site/gnocchi.yml
@@ -10,7 +10,6 @@
   apache:
     server:
       enabled: true
-      default_mpm: event
       modules:
         - wsgi
       site:
diff --git a/apache/server/site/panko.yml b/apache/server/site/panko.yml
index fe15a68..ef35c67 100644
--- a/apache/server/site/panko.yml
+++ b/apache/server/site/panko.yml
@@ -10,7 +10,6 @@
   apache:
     server:
       enabled: true
-      default_mpm: event
       modules:
         - wsgi
       site: