diff --git a/packages/core/package.json b/packages/core/package.json
index 588dd917..3a2b7d23 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@actions/core",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Actions core lib",
   "keywords": [
     "github",
diff --git a/packages/core/src/core.ts b/packages/core/src/core.ts
index 64ec017f..d67eccdf 100644
--- a/packages/core/src/core.ts
+++ b/packages/core/src/core.ts
@@ -46,6 +46,9 @@ export function exportVariable(name: string, val: string): void {
  */
 export function exportSecret(name: string, val: string): void {
   exportVariable(name, val)
+  // the runner will error with not implemented.  
+  // leaving the function but raising the error earlier
+  throw new Error("Not implemented.");
   issueCommand('set-secret', {}, val)
 }