diff --git a/dist/index.js b/dist/index.js
index e12ed4e..b927b21 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -57,7 +57,7 @@ const core = __webpack_require__(470);
 const fs = __webpack_require__(747);
 
 // get input parameter values from config
-var fileName = process.env.TMP + '\\' + core.getInput('fileName');
+var fileName = process.env.RUNNER_TEMP + '\\' + core.getInput('fileName');
 var encodedString = core.getInput('encodedString');
 
 // most @actions toolkit packages have async methods
diff --git a/index.js b/index.js
index 75bc693..a88db8d 100644
--- a/index.js
+++ b/index.js
@@ -2,7 +2,7 @@ const core = require('@actions/core');
 const fs = require('fs');
 
 // get input parameter values from config
-var fileName = process.env.TMP + '\\' + core.getInput('fileName');
+var fileName = process.env.RUNNER_TEMP + '\\' + core.getInput('fileName');
 var encodedString = core.getInput('encodedString');
 
 // most @actions toolkit packages have async methods