diff --git a/env-var.d.ts b/env-var.d.ts
index e408cce..a010c43 100644
--- a/env-var.d.ts
+++ b/env-var.d.ts
@@ -47,6 +47,11 @@ type PublicAccessors = {
    */
   asString: (input: string) =>  string;
 
+  /**
+   * Return the variable value as an Email. Throws an exception if value is not an Email.
+   */
+  asEmailString: (input: string) =>  string;
+
   /**
    * Attempt to parse the variable to a JSON Object or Array. Throws an exception if parsing fails.
    */
@@ -147,6 +152,11 @@ interface VariableAccessors <AlternateType = unknown> {
    */
   asString: () => AlternateType extends undefined ? undefined|string : string;
 
+  /**
+   * Return the variable value as an Email. Throws an exception if value is not an Email.
+   */
+  asEmailString: () => AlternateType extends undefined ? undefined|string : string;
+
   /**
    * Attempt to parse the variable to a JSON Object or Array. Throws an exception if parsing fails.
    */