diff --git a/.github/workflows/roscron-check-standard.yaml b/.github/workflows/roscron-check-standard.yaml
index 25e7f88..a8a6caa 100644
--- a/.github/workflows/roscron-check-standard.yaml
+++ b/.github/workflows/roscron-check-standard.yaml
@@ -26,8 +26,8 @@ jobs:
         config:
           - {os: windows-latest, r: 'release'}
           - {os: macOS-latest, r: 'release'}
-          - {os: ubuntu-latest, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
-          - {os: ubuntu-latest, r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
diff --git a/docs/pkgdown.yml b/docs/pkgdown.yml
index a57ed94..0d31156 100644
--- a/docs/pkgdown.yml
+++ b/docs/pkgdown.yml
@@ -3,5 +3,5 @@ pkgdown: 1.6.1
 pkgdown_sha: ~
 articles:
   rostemplate: rostemplate.html
-last_built: 2021-01-03T07:12Z
+last_built: 2021-01-03T07:27Z
 
diff --git a/inst/yaml/roscron-check-standard.yaml b/inst/yaml/roscron-check-standard.yaml
index 25e7f88..a8a6caa 100644
--- a/inst/yaml/roscron-check-standard.yaml
+++ b/inst/yaml/roscron-check-standard.yaml
@@ -26,8 +26,8 @@ jobs:
         config:
           - {os: windows-latest, r: 'release'}
           - {os: macOS-latest, r: 'release'}
-          - {os: ubuntu-latest, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
-          - {os: ubuntu-latest, r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'devel', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true