diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index d670703..222939b 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -20,15 +20,15 @@ jobs:
           - {os: windows-latest, r: 'release'  }
           - {os: macOS-latest,   r: 'devel'    }
           - {os: macOS-latest,   r: 'release'  }
-          - {os: ubuntu-20.04,   r: 'devel'    }
-          - {os: ubuntu-20.04,   r: 'release'  }
-          - {os: ubuntu-20.04,   r: 'oldrel'   }
-          - {os: ubuntu-20.04,   r: 'oldrel-1' }
-          - {os: ubuntu-20.04,   r: 'oldrel-2' }
-          - {os: ubuntu-20.04,   r: '3.4'      }
-          - {os: ubuntu-20.04,   r: 'release'  , language: ko,    label: ko    }
-          - {os: ubuntu-20.04,   r: 'release'  , language: zh_CN, label: zh_CN }
-          - {os: ubuntu-20.04,   r: 'release'  , language: zh_TW, label: zh_TW }
+          - {os: ubuntu-latest,  r: 'devel'    }
+          - {os: ubuntu-latest,  r: 'release'  }
+          - {os: ubuntu-latest,  r: 'oldrel'   }
+          - {os: ubuntu-latest,  r: 'oldrel-1' }
+          - {os: ubuntu-latest,  r: 'oldrel-2' }
+          - {os: ubuntu-latest,  r: '3.4'      }
+          - {os: ubuntu-latest,  r: 'release'  , language: ko,    label: ko    }
+          - {os: ubuntu-latest,  r: 'release'  , language: zh_CN, label: zh_CN }
+          - {os: ubuntu-latest,  r: 'release'  , language: zh_TW, label: zh_TW }
     env:
       R_KEEP_PKG_SOURCE: yes
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
@@ -42,7 +42,7 @@ jobs:
       LANGUAGE: ${{ matrix.config.language }}
       
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
diff --git a/.github/workflows/covr.yaml b/.github/workflows/covr.yaml
index ce0a27d..06439a4 100644
--- a/.github/workflows/covr.yaml
+++ b/.github/workflows/covr.yaml
@@ -8,7 +8,7 @@ jobs:
 
     timeout-minutes: 30
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     name: covr
 
@@ -17,7 +17,7 @@ jobs:
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      RSPM: https://packagemanager.rstudio.com/cran/__linux__/focal/latest
+      RSPM: https://packagemanager.rstudio.com/cran/__linux__/jammy/latest
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
       ## R CMD check
       _R_CHECK_LENGTH_1_CONDITION_: true
@@ -26,7 +26,7 @@ jobs:
       _R_CHECK_CRAN_INCOMING_: false
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2