diff --git a/magnum/drivers/swarm_fedora_atomic_v1/templates/cluster.yaml b/magnum/drivers/swarm_fedora_atomic_v1/templates/cluster.yaml
index e12c54b905..01b0e58696 100644
--- a/magnum/drivers/swarm_fedora_atomic_v1/templates/cluster.yaml
+++ b/magnum/drivers/swarm_fedora_atomic_v1/templates/cluster.yaml
@@ -101,7 +101,7 @@ parameters:
     default: 10.100.0.0/16
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each master
     default: 24
 
diff --git a/magnum/drivers/swarm_fedora_atomic_v1/templates/swarmmaster.yaml b/magnum/drivers/swarm_fedora_atomic_v1/templates/swarmmaster.yaml
index 8504859297..903d3d6a64 100644
--- a/magnum/drivers/swarm_fedora_atomic_v1/templates/swarmmaster.yaml
+++ b/magnum/drivers/swarm_fedora_atomic_v1/templates/swarmmaster.yaml
@@ -87,7 +87,7 @@ parameters:
     description: network range for flannel overlay network
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each master
 
   flannel_backend:
diff --git a/magnum/templates/kubernetes/kubecluster-coreos.yaml b/magnum/templates/kubernetes/kubecluster-coreos.yaml
index 1f54c199b2..8b8b778b45 100644
--- a/magnum/templates/kubernetes/kubecluster-coreos.yaml
+++ b/magnum/templates/kubernetes/kubecluster-coreos.yaml
@@ -68,7 +68,7 @@ parameters:
     default: 10.100.0.0/16
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each minion
     default: 24
 
diff --git a/magnum/templates/kubernetes/kubecluster-fedora-ironic.yaml b/magnum/templates/kubernetes/kubecluster-fedora-ironic.yaml
index 33e5875685..6a6e7098b3 100644
--- a/magnum/templates/kubernetes/kubecluster-fedora-ironic.yaml
+++ b/magnum/templates/kubernetes/kubecluster-fedora-ironic.yaml
@@ -50,7 +50,7 @@ parameters:
     default: 10.100.0.0/16
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each minion
     default: 24
 
diff --git a/magnum/templates/kubernetes/kubecluster.yaml b/magnum/templates/kubernetes/kubecluster.yaml
index 47a3eafb5c..c6d61696c7 100644
--- a/magnum/templates/kubernetes/kubecluster.yaml
+++ b/magnum/templates/kubernetes/kubecluster.yaml
@@ -67,7 +67,7 @@ parameters:
     default: 10.100.0.0/16
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each minion
     default: 24
 
diff --git a/magnum/templates/kubernetes/kubemaster-coreos.yaml b/magnum/templates/kubernetes/kubemaster-coreos.yaml
index 89fb76bd87..5b32400c30 100644
--- a/magnum/templates/kubernetes/kubemaster-coreos.yaml
+++ b/magnum/templates/kubernetes/kubemaster-coreos.yaml
@@ -45,7 +45,7 @@ parameters:
     description: network range for flannel overlay network
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each master
 
   flannel_backend:
diff --git a/magnum/templates/kubernetes/kubemaster-fedora-ironic.yaml b/magnum/templates/kubernetes/kubemaster-fedora-ironic.yaml
index 983fef4fad..76acb6b4cb 100644
--- a/magnum/templates/kubernetes/kubemaster-fedora-ironic.yaml
+++ b/magnum/templates/kubernetes/kubemaster-fedora-ironic.yaml
@@ -37,7 +37,7 @@ parameters:
     description: network range for flannel overlay network
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each minion
 
   flannel_backend:
diff --git a/magnum/templates/kubernetes/kubemaster.yaml b/magnum/templates/kubernetes/kubemaster.yaml
index cebcac127a..51f8519abf 100644
--- a/magnum/templates/kubernetes/kubemaster.yaml
+++ b/magnum/templates/kubernetes/kubemaster.yaml
@@ -53,7 +53,7 @@ parameters:
     description: network range for flannel overlay network
 
   flannel_network_subnetlen:
-    type: string
+    type: number
     description: size of subnet assigned to each master
 
   flannel_backend: