diff --git a/action.yml b/action.yml
index 0c6ecce..bcc62ab 100644
--- a/action.yml
+++ b/action.yml
@@ -23,7 +23,6 @@ inputs:
   source-pr:
     description: The PR of `magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false
-    default: 10
   source-revision:
     description: The revision of `nix-magic-nix-cache` to use. Conflicts with all other `source-*` options.
     required: false