diff --git a/leaseweb/server/installation/main.tf b/leaseweb/server/installation/main.tf
index 9b4be91..4125f11 100644
--- a/leaseweb/server/installation/main.tf
+++ b/leaseweb/server/installation/main.tf
@@ -21,7 +21,7 @@ dnf install -y epel-release
 dnf install -y systemd-networkd
 
 cat > /etc/udev/rules.d/10-shared.rules <<EOR
-SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="${var.internal_mac}", ATTR{addr_assign_type}=="0", NAME="shared"
+SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="${lower(var.internal_mac)}", ATTR{addr_assign_type}=="0", NAME="shared"
 EOR
 
 mkdir -p /etc/systemd/network
diff --git a/leaseweb/server/installation/versions.tf b/leaseweb/server/installation/versions.tf
index 4cacc37..ffea66f 100644
--- a/leaseweb/server/installation/versions.tf
+++ b/leaseweb/server/installation/versions.tf
@@ -3,7 +3,7 @@ terraform {
     # https://registry.terraform.io/providers/LeaseWeb/leaseweb/latest
     leaseweb = {
       source  = "LeaseWeb/leaseweb"
-      version = "0.4.0"
+      version = "~> 0.4"
     }
   }
 }
diff --git a/op/host/leaseweb/versions.tf b/op/host/leaseweb/versions.tf
index 8dbe45d..e1278f1 100644
--- a/op/host/leaseweb/versions.tf
+++ b/op/host/leaseweb/versions.tf
@@ -8,7 +8,7 @@ terraform {
     # https://registry.terraform.io/providers/LeaseWeb/leaseweb/latest
     leaseweb = {
       source  = "LeaseWeb/leaseweb"
-      version = "0.4.0"
+      version = "~> 0.4"
     }
   }
 }