diff --git a/action.yml b/action.yml
index 31360e4..d1d7612 100644
--- a/action.yml
+++ b/action.yml
@@ -7,6 +7,7 @@ inputs:
     default: '3.x'
   architecture:
     description: 'The target architecture (x86, x64) of the Python interpreter.'
+    default: 'x64'
 runs:
   using: 'node12'
   main: 'lib/setup-python.js'