diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 83157f6..9a4b625 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -23,7 +23,8 @@ jobs:
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
           - {os: ubuntu-latest,   r: 'oldrel-1'}
-          - {os: ubuntu-latest, r: '3.6'}
+          - {os: ubuntu-latest,   r: 'oldrel-2'}
+          - {os: ubuntu-latest,   r: 'oldrel-3'}
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
diff --git a/DESCRIPTION b/DESCRIPTION
index 5562291..3a5a1d6 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -39,7 +39,7 @@ Description: Streamlined data import and export by making assumptions that
 URL: https://gesistsa.github.io/rio/, https://github.com/gesistsa/rio
 BugReports: https://github.com/gesistsa/rio/issues
 Depends:
-    R (>= 3.6)
+    R (>= 4.0)
 Imports:
     tools,
     stats,