diff --git a/maec-delivery-vectors/machinetag.json b/maec-delivery-vectors/machinetag.json
index 937ca61..c38579a 100644
--- a/maec-delivery-vectors/machinetag.json
+++ b/maec-delivery-vectors/machinetag.json
@@ -1,5 +1,5 @@
 {
-  "namespace": "MAEC Delivery Vectors",
+  "namespace": "maec-delivery-vectors",
   "description": "Vectors used to deliver malware based on MAEC 5.0",
   "version": 1,
   "predicates": [
diff --git a/maec-malware-behavior/machinetag.json b/maec-malware-behavior/machinetag.json
index f0584e1..431edd4 100644
--- a/maec-malware-behavior/machinetag.json
+++ b/maec-malware-behavior/machinetag.json
@@ -1,5 +1,5 @@
 {
-  "namespace": "MAEC Malware Bahaviors",
+  "namespace": "maec-malware-behavior",
   "description": "Malware behaviours based on MAEC 5.0",
   "version": 1,
   "predicates": [
diff --git a/maec-malware-capabilities/machinetag.json b/maec-malware-capabilities/machinetag.json
index 8f15375..5645478 100644
--- a/maec-malware-capabilities/machinetag.json
+++ b/maec-malware-capabilities/machinetag.json
@@ -1,5 +1,5 @@
 {
-  "namespace": "MAEC Malware Capabilities",
+  "namespace": "maec-malware-capabilities",
   "description": "Malware Capabilities based on MAEC 5.0",
   "version": 1,
   "predicates": [
diff --git a/maec-malware-obfuscation-methods/machinetag.json b/maec-malware-obfuscation-methods/machinetag.json
index 1e3fae1..706845f 100644
--- a/maec-malware-obfuscation-methods/machinetag.json
+++ b/maec-malware-obfuscation-methods/machinetag.json
@@ -1,5 +1,5 @@
 {
-  "namespace": "MAEC Obfuscation methods",
+  "namespace": "maec-malware-obfuscation-methods",
   "description": "Obfuscation methods used by malware based on MAEC 5.0",
   "version": 1,
   "predicates": [