diff --git a/src/setup-python.ts b/src/setup-python.ts
index d004a3af..132c42f1 100644
--- a/src/setup-python.ts
+++ b/src/setup-python.ts
@@ -164,6 +164,8 @@ async function run() {
       if (pypiUrl) {
         const pypiUsername = core.getInput('pypi-username');
         const pypiPassword = core.getInput('pypi-password');
+        core.setSecret(pypiUsername);
+        core.setSecret(pypiPassword);
         await configurePipRepository(pypiUrl, pypiUsername, pypiPassword);
       }
       const pipInstall = core.getInput('pip-install');