diff --git a/.circleci/config.yml b/.circleci/config.yml
index c50734d..63bca57 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -120,7 +120,9 @@ workflows:
       - r-build:
           matrix:
             parameters:
-              r-version: ['4.4.3', '4.5.3', '4.6.0']
+              # Build against oldest patch versions x.y.0 as R is forward
+              # compatible.
+              r-version: ['4.4.0', '4.5.0', '4.6.0']
               os: ["macos-arm"]
           filters:
             branches:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8e90946..355b156 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -27,7 +27,9 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        R: [ '4.4.3', '4.5.3', '4.6.0' ]
+        # Build against oldest patch versions x.y.0 as R is forward
+        # compatible.
+        R: [ '4.4.0', '4.5.0', '4.6.0' ]
         os: [ 'macos-15-intel', 'ubuntu-24.04', 'windows-latest']
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.R }} ${{ matrix.os }} build
@@ -183,7 +185,7 @@ jobs:
         draft: true
         name: SimpleITK ${{ github.ref_name }} R Package Release
         body: |
-          **Please review and test the packages before publishing this release. Then remove this line and make it public.**
+          **Please manually upload the artifacts from CircleCI, review and test the packages before publishing this release. Then remove this line and make it public.**
 
           Detailed release notes are available on the [main SimpleITK repository](https://github.com/SimpleITK/SimpleITK/releases/${{ github.ref_name }}).