diff --git a/.gitignore b/.gitignore
index a853871..dfb006c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ dist/
 config/oauth_config.json
 config/iparam_test_data.json
 log/*
+fdk.log
diff --git a/current-host/app/index.html b/current-host/app/index.html
index 75ca479..3da644b 100644
--- a/current-host/app/index.html
+++ b/current-host/app/index.html
@@ -18,7 +18,7 @@
 </body>
 
 <script defer src="scripts/app.js"></script>
-<script async type="module" src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.esm.js"></script>
-<script async nomodule src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.js"></script>
+  <script async type="module" src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.esm.js"></script>
+  <script async nomodule src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.js"></script>
 
 </html>
diff --git a/current-host/app/scripts/app.js b/current-host/app/scripts/app.js
index e8ad9fa..9bcd931 100644
--- a/current-host/app/scripts/app.js
+++ b/current-host/app/scripts/app.js
@@ -1,4 +1,4 @@
-var client;
+let client;
 
 init();
 
diff --git a/current-host/manifest.json b/current-host/manifest.json
index 5a4d6dd..1ab1438 100644
--- a/current-host/manifest.json
+++ b/current-host/manifest.json
@@ -36,7 +36,7 @@
     }
   },
   "engines": {
-    "node": "18.16.1",
-    "fdk": "9.1.0"
+    "node": "18.20.8",
+    "fdk": "9.7.0"
   }
 }
diff --git a/iparams-html/app/index.html b/iparams-html/app/index.html
index 095862b..b7edb93 100644
--- a/iparams-html/app/index.html
+++ b/iparams-html/app/index.html
@@ -19,7 +19,7 @@
 </body>
 
 <script defer src="scripts/app.js"></script>
-<script async type="module" src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.esm.js"></script>
-<script async nomodule src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.js"></script>
+  <script async type="module" src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.esm.js"></script>
+  <script async nomodule src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.js"></script>
 
 </html>
diff --git a/iparams-html/app/scripts/app.js b/iparams-html/app/scripts/app.js
index 08e2a74..3e01e3b 100644
--- a/iparams-html/app/scripts/app.js
+++ b/iparams-html/app/scripts/app.js
@@ -1,4 +1,4 @@
-var client;
+let client;
 
 init();
 
diff --git a/iparams-html/manifest.json b/iparams-html/manifest.json
index 5a4d6dd..1ab1438 100644
--- a/iparams-html/manifest.json
+++ b/iparams-html/manifest.json
@@ -36,7 +36,7 @@
     }
   },
   "engines": {
-    "node": "18.16.1",
-    "fdk": "9.1.0"
+    "node": "18.20.8",
+    "fdk": "9.7.0"
   }
 }
diff --git a/iparams-json/app/index.html b/iparams-json/app/index.html
index 9126237..165b252 100644
--- a/iparams-json/app/index.html
+++ b/iparams-json/app/index.html
@@ -18,6 +18,6 @@
   </body>
 
   <script defer src="scripts/app.js"></script>
-  <script async type="module" src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.esm.js"></script>
-  <script async nomodule src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.js"></script>
+  <script async type="module" src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.esm.js"></script>
+  <script async nomodule src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.js"></script>
 </html>
diff --git a/iparams-json/app/scripts/app.js b/iparams-json/app/scripts/app.js
index 08e2a74..3e01e3b 100644
--- a/iparams-json/app/scripts/app.js
+++ b/iparams-json/app/scripts/app.js
@@ -1,4 +1,4 @@
-var client;
+let client;
 
 init();
 
diff --git a/iparams-json/manifest.json b/iparams-json/manifest.json
index 5a4d6dd..1ab1438 100644
--- a/iparams-json/manifest.json
+++ b/iparams-json/manifest.json
@@ -36,7 +36,7 @@
     }
   },
   "engines": {
-    "node": "18.16.1",
-    "fdk": "9.1.0"
+    "node": "18.20.8",
+    "fdk": "9.7.0"
   }
 }
diff --git a/placeholders/app/index.html b/placeholders/app/index.html
index 6ad2de0..865fadf 100644
--- a/placeholders/app/index.html
+++ b/placeholders/app/index.html
@@ -19,7 +19,7 @@
 </body>
 
 <script defer src="scripts/app.js"></script>
-<script async type="module" src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.esm.js"></script>
-<script async nomodule src="https://unpkg.com/@freshworks/crayons@3/dist/crayons/crayons.js"></script>
+  <script async type="module" src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.esm.js"></script>
+  <script async nomodule src="https://cdn.jsdelivr.net/npm/@freshworks/crayons@v4/dist/crayons/crayons.js"></script>
 
 </html>
diff --git a/placeholders/manifest.json b/placeholders/manifest.json
index 5a4d6dd..1ab1438 100644
--- a/placeholders/manifest.json
+++ b/placeholders/manifest.json
@@ -36,7 +36,7 @@
     }
   },
   "engines": {
-    "node": "18.16.1",
-    "fdk": "9.1.0"
+    "node": "18.20.8",
+    "fdk": "9.7.0"
   }
 }