diff --git a/v1/self-update-versions.json b/v1/self-update-versions.json
new file mode 100644
index 0000000..279b9f6
--- /dev/null
+++ b/v1/self-update-versions.json
@@ -0,0 +1,56 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://example.com/versions-schema.json",
+  "title": "Versions Schema",
+  "description": "Schema for versions list for PHPCQ self-update",
+  "type": "object",
+  "properties": {
+    "updated": {
+      "type": "string",
+      "format": "date-time",
+      "description": "Timestamp of the last update"
+    },
+    "versions": {
+      "type": "array",
+      "description": "List of available versions",
+      "items": {
+        "type": "object",
+        "properties": {
+          "version": {
+            "type": "string",
+            "description": "Version number following the semver standard"
+          },
+          "phar": {
+            "type": "string",
+            "description": "File path of the phar file relative to the versions.json"
+          },
+          "signature": {
+            "type": [ "string", "null" ],
+            "description": "File path of the signature file relative to the versions.json"
+          },
+          "requirements": {
+            "type": "object",
+            "description": "Abhängigkeiten der Version",
+            "properties": {
+              "php": {
+                "type": "string",
+                "description": "PHP requirement"
+              }
+            },
+            "patternProperties": {
+              "^ext-[a-zA-Z0-9_-]+$": {
+                "type": "string",
+                "description": "PHP extension requirement"
+              }
+            },
+            "additionalProperties": true
+          }
+        },
+        "required": ["version", "phar", "signature", "requirements"],
+        "additionalProperties": false
+      }
+    }
+  },
+  "required": ["updated", "versions"],
+  "additionalProperties": false
+}