diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ca1f7b1..30be912f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,10 +24,11 @@ jobs:
       matrix:
         os:
           - ubuntu-18.04
+          - ubuntu-20.04
         tool:
           # Note: Specifying the version of valgrind and wasm-pack is not supported.
           - cargo-hack,cargo-llvm-cov,cargo-minimal-versions,parse-changelog,cross,shellcheck,shfmt,valgrind,wasm-pack,wasmtime
-          - cargo-hack@0.5.12,cargo-llvm-cov@0.2.0,cargo-minimal-versions@0.1.3,parse-changelog@0.4.7,cross@0.2.1,shellcheck@0.8.0,shfmt@3.4.2,wasmtime@0.34.0
+          - cargo-hack@0.5.12,cargo-llvm-cov@0.2.2,cargo-minimal-versions@0.1.3,parse-changelog@0.4.7,cross@0.2.1,shellcheck@0.8.0,shfmt@3.4.3,wasmtime@0.34.0
         include:
           - os: macos-10.15
             tool: cargo-hack,cargo-llvm-cov,cargo-minimal-versions,parse-changelog,cross,shellcheck,shfmt,wasm-pack,wasmtime
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf34e984..c2172cb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `cargo-llvm-cov@latest` to 0.2.2.
+
 ## [1.1.6] - 2022-02-20
 
 - Update `cargo-llvm-cov@latest` to 0.2.1.
diff --git a/main.sh b/main.sh
index d30ab0ea..c7bd080e 100755
--- a/main.sh
+++ b/main.sh
@@ -59,7 +59,7 @@ for tool in "${tools[@]}"; do
                 # https://github.com/taiki-e/cargo-hack/releases
                 cargo-hack) latest_version="0.5.12" ;;
                 # https://github.com/taiki-e/cargo-llvm-cov/releases
-                cargo-llvm-cov) latest_version="0.2.1" ;;
+                cargo-llvm-cov) latest_version="0.2.2" ;;
                 # https://github.com/taiki-e/cargo-minimal-versions/releases
                 cargo-minimal-versions) latest_version="0.1.3" ;;
                 # https://github.com/taiki-e/parse-changelog/releases
@@ -146,12 +146,12 @@ for tool in "${tools[@]}"; do
                 latest) ;;
                 *) warn "specifying the version of ${tool} is not supported yet by this action" ;;
             esac
-            sudo apt-get -o Acquire::Retries=10 -qq update
+            retry sudo apt-get -o Acquire::Retries=10 -qq update
             # libc6-dbg is needed to run Valgrind
-            sudo apt-get -o Acquire::Retries=10 -qq -o Dpkg::Use-Pty=0 install -y libc6-dbg
+            retry sudo apt-get -o Acquire::Retries=10 -qq -o Dpkg::Use-Pty=0 install -y libc6-dbg
             # Use snap to install the latest Valgrind
             # https://snapcraft.io/install/valgrind/ubuntu
-            sudo snap install valgrind --classic
+            retry sudo snap install valgrind --classic
             ;;
         wasm-pack)
             # https://rustwasm.github.io/wasm-pack/installer