diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b82872..d78763e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,18 @@
 
 All notable changes to this module will be documented in this file.
 
+## [v1.2.2] - 2023-11-20
+
+### Changed
+
+- Resolved an issue with Terraform apply process
+  - From function(data) `base64sha256(data.archive_file.this.output_path)` to use data.output `data.archive_file.this.output_base64sha256`
+- Set null resource provider version `>= 3.0.0`
+
+### Removed
+
+- Unused variables `plaintext_params` and `config_file_name` 
+
 ## [v1.2.1] - 2023-10-19
 
 ### Changed
diff --git a/main.tf b/main.tf
index 323bd91..9c30802 100644
--- a/main.tf
+++ b/main.tf
@@ -256,7 +256,7 @@ resource "aws_lambda_function" "this" {
 
   # Read source code from local
   filename         = local.file_name
-  source_code_hash = base64sha256(data.archive_file.this.output_path)
+  source_code_hash = data.archive_file.this.output_base64sha256
 
   # Specification
   timeout                        = var.timeout
diff --git a/variables.tf b/variables.tf
index a26e095..f380b14 100644
--- a/variables.tf
+++ b/variables.tf
@@ -43,25 +43,6 @@ variable "source_code_dir" {
   default     = ""
 }
 
-variable "plaintext_params" {
-  description = <<EOF
-  Lambda@Edge does not support env vars, so it is a common pattern to exchange Env vars for values read from a config file.
-  ! PLAINTEXT
-
-  ```
-  const config = JSON.parse(readFileSync('./config.json'))
-  const someConfigValue = config.SomeKey
-  ```
-  EOF
-  type        = map(string)
-  default     = {}
-}
-
-variable "config_file_name" {
-  description = "The name of the file var.plaintext_params will be written to as json"
-  type        = string
-  default     = "config.json"
-}
 /* -------------------------------------------------------------------------- */
 /*                            Resource Based Policy                           */
 /* -------------------------------------------------------------------------- */
diff --git a/versions.tf b/versions.tf
index 63796b4..adba2a3 100644
--- a/versions.tf
+++ b/versions.tf
@@ -10,5 +10,9 @@ terraform {
       source  = "hashicorp/archive"
       version = ">= 2.0.0"
     }
+    null = {
+      source  = "hashicorp/null"
+      version = ">= 3.0.0"
+    }
   }
 }