diff --git a/.ci/test_r_package.sh b/.ci/test_r_package.sh
index 76c00821b81b..f38e516f5f4b 100755
--- a/.ci/test_r_package.sh
+++ b/.ci/test_r_package.sh
@@ -18,8 +18,8 @@ if [[ "${R_MAJOR_VERSION}" == "3" ]]; then
     export R_LINUX_VERSION="3.6.3-1bionic"
     export R_APT_REPO="bionic-cran35/"
 elif [[ "${R_MAJOR_VERSION}" == "4" ]]; then
-    export R_MAC_VERSION=4.0.2
-    export R_LINUX_VERSION="4.0.2-1.1804.0"
+    export R_MAC_VERSION=4.0.3
+    export R_LINUX_VERSION="4.0.3-1.1804.0"
     export R_APT_REPO="bionic-cran40/"
 else
     echo "Unrecognized R version: ${R_VERSION}"
diff --git a/.ci/test_r_package_windows.ps1 b/.ci/test_r_package_windows.ps1
index ea8cd39a7a44..42548dd49838 100644
--- a/.ci/test_r_package_windows.ps1
+++ b/.ci/test_r_package_windows.ps1
@@ -43,7 +43,7 @@ if ($env:R_MAJOR_VERSION -eq "3") {
   $RTOOLS_INSTALL_PATH = "C:\rtools40"
   $env:RTOOLS_MINGW_BIN = "$RTOOLS_INSTALL_PATH/mingw64/bin"
   $env:RTOOLS_EXE_FILE = "rtools40-x86_64.exe"
-  $env:R_WINDOWS_VERSION = "4.0.2"
+  $env:R_WINDOWS_VERSION = "4.0.3"
 } else {
   Write-Output "[ERROR] Unrecognized R version: $env:R_VERSION"
   Check-Output $false
diff --git a/.github/workflows/r_package.yml b/.github/workflows/r_package.yml
index e26bd865bbbe..98ae1e36db9e 100644
--- a/.github/workflows/r_package.yml
+++ b/.github/workflows/r_package.yml
@@ -163,8 +163,7 @@ jobs:
     name: r-package (ubuntu-latest, R-devel, GCC ASAN/UBSAN)
     timeout-minutes: 60
     runs-on: ubuntu-latest
-    container:
-      image: rhub/rocker-gcc-san
+    container: rhub/rocker-gcc-san
     steps:
       - name: Checkout repository
         uses: actions/checkout@v1