diff --git a/README.md b/README.md
index af99b32..de2b055 100644
--- a/README.md
+++ b/README.md
@@ -93,12 +93,12 @@ You may need to run this with `sudo`, or from within an Administrator command sh
 
 ## Documentation
 
-- [Use cases](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#use-cases) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#use-cases))
-- [How to use Node generator](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#how-to-use-node-generator) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#how-to-use-node-generator))
-- [Generated files which node package contains](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#generated-files-which-node-package-contains) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#generated-files-which-node-package-contains))
-- [How to create a node from OpenAPI document](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#how-to-create-a-node-from-openapi-document) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#how-to-create-a-node-from-openapi-document))
-- [How to create a node from function node](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#how-to-create-a-node-from-function-node) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#how-to-create-a-node-from-function-node))
-- [How to create a node from subflow](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#how-to-create-a-node-from-subflow) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#how-to-create-a-node-from-subflow))
-- [How to create a node from WoT Thing Description](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index.md#how-to-create-a-node-from-wot-thing-description) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.2/docs/index_ja.md#how-to-create-a-node-from-wot-thing-description))
+- [Use cases](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#use-cases) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#use-cases))
+- [How to use Node generator](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#how-to-use-node-generator) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#how-to-use-node-generator))
+- [Generated files which node package contains](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#generated-files-which-node-package-contains) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#generated-files-which-node-package-contains))
+- [How to create a node from OpenAPI document](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#how-to-create-a-node-from-openapi-document) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#how-to-create-a-node-from-openapi-document))
+- [How to create a node from function node](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#how-to-create-a-node-from-function-node) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#how-to-create-a-node-from-function-node))
+- [How to create a node from subflow](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#how-to-create-a-node-from-subflow) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#how-to-create-a-node-from-subflow))
+- [How to create a node from WoT Thing Description](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index.md#how-to-create-a-node-from-wot-thing-description) ([Japanese](https://github.com/node-red/node-red-nodegen/blob/0.2.3/docs/index_ja.md#how-to-create-a-node-from-wot-thing-description))
 
 Note: Currently node generator supports GET and POST methods using JSON format without authentication.
diff --git a/lib/subflow/index.js b/lib/subflow/index.js
index 8a3d0a4..bd9e7c5 100644
--- a/lib/subflow/index.js
+++ b/lib/subflow/index.js
@@ -54,7 +54,7 @@ function createJSON(dstPath, flow, encoding, key) {
     else {
         sf.flow = newFlow;
     }
-    const data = JSON.stringify(sf, null, "\t");
+    const data = JSON.stringify(sf, null, 4);
     fs.writeFileSync(dstPath, data);
 }
 
@@ -79,6 +79,7 @@ module.exports = async function(data, options) {
     if (!data.license || (data.license === "")) {
         data.license = "unknown";
     }
+    data.keywords = data.keywords || meta.keywords;
     data.info = meta.info;
 
     var params = {
diff --git a/lib/swagger/index.js b/lib/swagger/index.js
index 2c6d0f5..360802f 100644
--- a/lib/swagger/index.js
+++ b/lib/swagger/index.js
@@ -24,7 +24,7 @@ async function getSpec(src, data) {
             let response = await axios.get(src, requestOptions);
             spec = response.data;
         } else if (/\.yaml$/.test(src)) {
-            spec = yamljs.load(util.skipBom(await fs.promises.readFile(src)));
+            spec = yamljs.load(src);
         } else if (/\.json/.test(src)) {
             spec = JSON.parse(util.skipBom(await fs.promises.readFile(src)));
         } else {
diff --git a/package.json b/package.json
index 18b4bd3..2bf801e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-red-nodegen",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "Node generator for Node-RED",
   "homepage": "http://nodered.org",
   "main": "./lib/nodegen.js",
diff --git a/templates/function/package.json.mustache b/templates/function/package.json.mustache
index 095a498..bf1f3cb 100644
--- a/templates/function/package.json.mustache
+++ b/templates/function/package.json.mustache
@@ -6,7 +6,11 @@
   "scripts": {
     "test": "mocha \"test/**/*_spec.js\" --timeout 3000"
   },
+  "engines": {
+    "node": ">=12.0.0"
+  },
   "node-red": {
+    "version": ">=1.3.7",
     "nodes": {
       "{{&nodeName}}": "node.js"
     }
diff --git a/templates/subflow/README.md.mustache b/templates/subflow/README.md.mustache
index cae8709..a3b2239 100644
--- a/templates/subflow/README.md.mustache
+++ b/templates/subflow/README.md.mustache
@@ -9,6 +9,8 @@ Run the following command in your Node-RED user directory - typically `~/.node-r
 
         npm install {{&projectName}}
 
+{{#nodeRead}}
 ## Information
 
 {{&nodeRead}}
+{{/nodeRead}}
diff --git a/templates/subflow/package.json.mustache b/templates/subflow/package.json.mustache
index 9902cc9..a492866 100644
--- a/templates/subflow/package.json.mustache
+++ b/templates/subflow/package.json.mustache
@@ -7,7 +7,11 @@
     "{{name}}"{{^last}}, {{/last}}
     {{/keywords}}
   ],
+  "engines": {
+    "node": ">=12.0.0"
+  },
   "node-red": {
+    "version": ">=1.3.7",
     "nodes": {
       "{{&nodeName}}": "subflow.js"
     }
diff --git a/templates/swagger/package.json.mustache b/templates/swagger/package.json.mustache
index 67049b0..5d7b4f3 100644
--- a/templates/swagger/package.json.mustache
+++ b/templates/swagger/package.json.mustache
@@ -6,7 +6,11 @@
   "scripts": {
     "test": "mocha \"test/**/*_spec.js\" --timeout 3000"
   },
+  "engines": {
+    "node": ">=12.0.0"
+  },
   "node-red": {
+    "version": ">=1.3.7",
     "nodes": {
       "{{&nodeName}}": "node.js"
     }
@@ -19,7 +23,7 @@
   "dependencies": {
     "q": "1.5.1",
     "request": "2.88.2",
-    "file-type": "17.1.1"
+    "file-type": "16.5.3"
   },
   "devDependencies": {
     "mocha": "9.2.1",
diff --git a/templates/webofthings/package.json.mustache b/templates/webofthings/package.json.mustache
index a134e96..4b18e4b 100644
--- a/templates/webofthings/package.json.mustache
+++ b/templates/webofthings/package.json.mustache
@@ -1,37 +1,41 @@
 {
-    "name": "{{&projectName}}",
-    "version": "{{&projectVersion}}",
-    "description": "Node-RED node for {{&nodeName}}",
-    "main": "node.js",
-    "scripts": {
-        "test": "mocha \"test/**/*_spec.js\""
-    },
-    "node-red": {
-        "nodes": {
-            "{{&nodeName}}": "node.js"
-        }
-    },
-    "keywords": [
-        {{#keywords}}
-        "{{name}}"{{^last}}, {{/last}}
-        {{/keywords}}
-    ],
-    "dependencies": {
-        "https-proxy-agent": "5.0.0",
-        "request": "2.88.2",
-        "ws": "8.5.0",
-        "url-template": "2.0.8",
-        "ajv": "8.10.0",
-        "coap": "1.0.3"
-    },
-    "devDependencies": {
-        "node-red": "2.2.2",
-        "node-red-node-test-helper": "0.2.7"
-    },
-    "license": "{{&licenseName}}",
-    "wot": {
-        {{#wotmeta}}
-        "{{name}}": "{{value}}"{{^last}}, {{/last}}
-        {{/wotmeta}}
+  "name": "{{&projectName}}",
+  "version": "{{&projectVersion}}",
+  "description": "Node-RED node for {{&nodeName}}",
+  "main": "node.js",
+  "scripts": {
+    "test": "mocha \"test/**/*_spec.js\""
+  },
+  "engines": {
+    "node": ">=12.0.0"
+  },
+  "node-red": {
+    "version": ">=1.3.7",
+    "nodes": {
+      "{{&nodeName}}": "node.js"
     }
+  },
+  "keywords": [
+    {{#keywords}}
+    "{{name}}"{{^last}}, {{/last}}
+    {{/keywords}}
+  ],
+  "dependencies": {
+    "https-proxy-agent": "5.0.0",
+    "request": "2.88.2",
+    "ws": "8.5.0",
+    "url-template": "2.0.8",
+    "ajv": "8.10.0",
+    "coap": "1.0.3"
+  },
+  "devDependencies": {
+    "node-red": "2.2.2",
+    "node-red-node-test-helper": "0.2.7"
+  },
+  "license": "{{&licenseName}}",
+  "wot": {
+    {{#wotmeta}}
+    "{{name}}": "{{value}}"{{^last}}, {{/last}}
+    {{/wotmeta}}
+  }
 }