diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index fab32b7..09fd8af 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.0.0
+current_version = 1.0.1
 commit = True
 message = Bumps version to {new_version}
 tag = False
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6723aaf..7b335fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](http://semver.org/).
 
+### [1.0.1] (https://github.com/plus3it/terraform-aws-tardigrade-account-alternate-contacts/releases/tag/1.0.1)
+
+**Released**: 2024.11.27
+
+**Summary**:
+
+*   Adds variable validation
+
 ### [1.0.0] (https://github.com/plus3it/terraform-aws-tardigrade-account-alternate-contacts/releases/tag/1.0.0)
 
 **Released**: 2023.02.09
diff --git a/variables.tf b/variables.tf
index c490bfe..915c5bc 100644
--- a/variables.tf
+++ b/variables.tf
@@ -19,4 +19,38 @@ variable "account_alternate_contacts" {
       phone_number  = string
     }))
   })
+  validation {
+    condition = alltrue([
+      for type in var.account_alternate_contacts :
+      length(type.name) >= 1 &&
+      length(type.name) <= 64
+    ])
+    error_message = "Invalid value for Name (must be between 1 and 64 characters)"
+  }
+  validation {
+    condition = alltrue([
+      for type in var.account_alternate_contacts :
+      length(type.title) >= 1 &&
+      length(type.title) <= 50
+    ])
+    error_message = "Invalid value for Title (must be between 1 and 50 characters)"
+  }
+  validation {
+    condition = alltrue([
+      for type in var.account_alternate_contacts :
+      length(type.email_address) >= 1 &&
+      length(type.email_address) <= 254 &&
+      can(regex("^[\\s]*[\\w+=.#|!&-]+@[\\w.-]+\\.[\\w]+[\\s]*$", type.email_address))
+    ])
+    error_message = "Invalid value for email address (must be between 1 and 50 characters and correct syntax)"
+  }
+  validation {
+    condition = alltrue([
+      for type in var.account_alternate_contacts :
+      length(type.phone_number) >= 1 &&
+      length(type.phone_number) <= 25 &&
+      can(regex("^[\\s0-9()+-]+$", type.phone_number))
+    ])
+    error_message = "Invalid value for phone number (must be between 1 and 50 characters and correct syntax)"
+  }
 }