diff --git a/.github/actions/setup-dependencies/action.yml b/.github/actions/setup-dependencies/action.yml
index d556f81..e3171eb 100644
--- a/.github/actions/setup-dependencies/action.yml
+++ b/.github/actions/setup-dependencies/action.yml
@@ -37,8 +37,8 @@ runs:
         while read -r cmd
         do
           eval sudo $cmd
-        done < <(Rscript -e 'writeLines(remotes::system_requirements("ubuntu", "22.04"))')
-        sudo apt install libcurl4-openssl-dev libharfbuzz-dev libfribidi-dev libicu-dev
+        done < <(Rscript -e 'writeLines(remotes::system_requirements("ubuntu", "20.04"))')
+        sudo apt install libcurl4-openssl-dev libharfbuzz-dev libfribidi-dev
       shell: bash
 
     - name: Install png (temporary)
diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index fd8e80b..22e9e3d 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -29,7 +29,7 @@ jobs:
         config:
           - {os: windows-2022, r: 'release'}
           - {os: macOS-13, r: 'release'}
-          - {os: ubuntu-22.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
+          - {os: ubuntu-20.04, r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index ceaf18b..2781a64 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -6,7 +6,7 @@ name: Deploy pharmr
 
 jobs:
   deploy:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
       RSPM: "https://packagemanager.rstudio.com/cran/__linux__/focal/latest"