diff --git a/extensions.md b/extensions.md
index c5949a6da..cac921a76 100644
--- a/extensions.md
+++ b/extensions.md
@@ -8,3 +8,7 @@ The purpose of this file is to keep track of and avoid collisions in Extension `
 | Splunk      | splunk   | **997** | The Splunk schema extension |
 | AWS         | aws      | **998** | The Amazon Web Services schema extension |
 | Development | dev      | **999** | The development (TODO) schema extensions |
+| _Native Extensions defined in OCSF_ |
+| Linux       | linux    | **1** | The Linux extension defines Linux specific attributes, objects and classes |
+| Windows     | win      | **2** | The Windows extension defines Windows specific attributes, objects and classes |
+| macOS       | macos    | **3** | The macOS extension defines macOS specific attributes, objects and classes |
\ No newline at end of file
diff --git a/extensions/linux/extension.json b/extensions/linux/extension.json
index 78afb3284..2b72fa8d7 100644
--- a/extensions/linux/extension.json
+++ b/extensions/linux/extension.json
@@ -1,6 +1,7 @@
 {
   "caption": "Linux",
-  "description": "The Linux extension defines Linux specific attributes.",
+  "description": "The Linux extension defines Linux specific attributes, objects and classes.",
   "name": "linux",
-  "uid": 1
+  "uid": 1,
+  "version": "1.1.0-dev"
 }
diff --git a/extensions/macos/extension.json b/extensions/macos/extension.json
index 7656c4673..b463dfeed 100644
--- a/extensions/macos/extension.json
+++ b/extensions/macos/extension.json
@@ -2,5 +2,6 @@
   "caption": "macOS",
   "description": "The macOS extension defines macOS specific attributes, objects and classes.",
   "name": "macos",
-  "uid": 3
+  "uid": 3,
+  "version": "1.1.0-dev"
 }
\ No newline at end of file
diff --git a/extensions/windows/extension.json b/extensions/windows/extension.json
index ddc1067ef..8ab466b87 100644
--- a/extensions/windows/extension.json
+++ b/extensions/windows/extension.json
@@ -1,6 +1,7 @@
 {
   "caption": "Windows",
-  "description": "The Windows extension defines Windows specific attributes.",
+  "description": "The Windows extension defines Windows specific attributes, objects and classes.",
   "name": "win",
-  "uid": 2
+  "uid": 2,
+  "version": "1.1.0-dev"
 }