diff --git a/action.yml b/action.yml
index 5281d42..7f625e5 100644
--- a/action.yml
+++ b/action.yml
@@ -8,7 +8,8 @@ branding:
 inputs:
   toolchain:
     description: Rust toolchain specification -- see https://rust-lang.github.io/rustup/concepts/toolchains.html#toolchain-specification
-    required: true
+    required: false
+    default: nightly
   targets:
     description: Comma-separated list of target triples to install for this toolchain
     required: false
@@ -18,6 +19,7 @@ inputs:
   components:
     description: Comma-separated list of components to be additionally installed
     required: false
+    default: miri, rust-src
 
 outputs:
   cachekey:
diff --git a/scripts/update-revs.sh b/scripts/update-revs.sh
index 462b223..84693a3 100755
--- a/scripts/update-revs.sh
+++ b/scripts/update-revs.sh
@@ -15,7 +15,7 @@ patch_releases=(
 )
 
 releases() {
-    printf "%s\n" 1.{0..90}.0 ${patch_releases[@]} | sort -V
+    printf "%s\n" 1.{0..100}.0 ${patch_releases[@]} | sort -V
 }
 
 base=$(git rev-parse HEAD)