diff --git a/cloudbuild-task-contracts/src/Inputs.ts b/cloudbuild-task-contracts/src/Inputs.ts
index ba96d4e..a72e688 100644
--- a/cloudbuild-task-contracts/src/Inputs.ts
+++ b/cloudbuild-task-contracts/src/Inputs.ts
@@ -13,5 +13,8 @@ export abstract class Inputs {
 	 * @param required A value indicating whether an explicit value for this input is required.
 	 * @returns A boolean value.
 	 */
-	abstract getBoolInput(name: string, required?: boolean): boolean | undefined;
+	getBoolInput(name: string, required?: boolean): boolean | undefined {
+			const value = this.getInput(name, required);
+			return value === undefined ? undefined : value.toLowerCase() === "true";
+	}
 }
diff --git a/cloudbuild-task-github-actions/src/Inputs.ts b/cloudbuild-task-github-actions/src/Inputs.ts
index 14a4920..66c3e4d 100644
--- a/cloudbuild-task-github-actions/src/Inputs.ts
+++ b/cloudbuild-task-github-actions/src/Inputs.ts
@@ -1,13 +1,8 @@
 import * as contracts from 'cloudbuild-task-contracts';
 import * as core from '@actions/core';
 
-export class Inputs implements contracts.Inputs {
+export class Inputs extends contracts.Inputs {
 	getInput(name: string, required?: boolean): string | undefined {
 		return core.getInput(name, { required: required });
 	}
-
-	getBoolInput(name: string, required?: boolean): boolean | undefined {
-		const value = this.getInput(name, required);
-		return value === undefined ? undefined : value.toLowerCase() === "true";
-	}
 }