diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8f754a2bc..6f8cd4573 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -51,7 +51,7 @@ jobs:
     - name: Bootstrap
       run: |
         sudo rm /etc/apt/sources.list.d/* && sudo apt-get update
-        sudo apt-get --no-install-recommends install -y clang-format-14 clang-tidy-9 shellcheck
+        sudo apt-get --no-install-recommends install -y clang-format-14 clang-tidy-14 shellcheck
         python3 -m pip install yapf==0.31.0
         sudo snap install shfmt
     - name: Check
@@ -112,7 +112,7 @@ jobs:
         script/test package
 
   scan-build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v3
       with:
@@ -120,7 +120,7 @@ jobs:
     - name: Bootstrap
       run: |
         sudo rm /etc/apt/sources.list.d/* && sudo apt-get update
-        sudo apt-get --no-install-recommends install -y clang-tools-9 ninja-build
+        sudo apt-get --no-install-recommends install -y clang-tools-14 ninja-build
     - name: Run
       run: |
         script/check-scan-build
diff --git a/script/bootstrap b/script/bootstrap
index d25f3d2db..e1d662bbd 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -38,7 +38,7 @@ install_packages_pretty_format()
     echo 'Installing pretty tools useful for code contributions...'
 
     # add clang-format and clang-tidy for pretty
-    sudo apt-get --no-install-recommends install -y clang-format-14 clang-tidy-9 || echo 'WARNING: could not install clang-format-14 and clang-tidy-9, which is useful if you plan to contribute C/C++ code to the OpenThread project.'
+    sudo apt-get --no-install-recommends install -y clang-format-14 clang-tidy-14 || echo 'WARNING: could not install clang-format-14 and clang-tidy-14, which is useful if you plan to contribute C/C++ code to the OpenThread project.'
 
     # add yapf for pretty
     python3 -m pip install yapf==0.31.0 || echo 'WARNING: could not install yapf, which is useful if you plan to contribute python code to the OpenThread project.'
diff --git a/script/check-scan-build b/script/check-scan-build
index 0a18b9f93..bc672d351 100755
--- a/script/check-scan-build
+++ b/script/check-scan-build
@@ -88,8 +88,8 @@ main()
     mkdir -p build
     cd build
 
-    scan-build-9 cmake -GNinja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DOT_COMPILE_WARNING_AS_ERROR=ON -DCMAKE_C_FLAGS="${OT_CFLAGS[*]}" -DCMAKE_CXX_FLAGS="${OT_CFLAGS[*]}" "${OT_BUILD_OPTIONS[@]}" "${OT_SRCDIR}"
-    scan-build-9 --status-bugs -analyze-headers -v ninja
+    scan-build-14 cmake -GNinja -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DOT_COMPILE_WARNING_AS_ERROR=ON -DCMAKE_C_FLAGS="${OT_CFLAGS[*]}" -DCMAKE_CXX_FLAGS="${OT_CFLAGS[*]}" "${OT_BUILD_OPTIONS[@]}" "${OT_SRCDIR}"
+    scan-build-14 --status-bugs -analyze-headers -v ninja
 
     cd "${OT_SRCDIR}"
 }
diff --git a/script/clang-tidy b/script/clang-tidy
index b2dfb4d4d..c46080926 100755
--- a/script/clang-tidy
+++ b/script/clang-tidy
@@ -27,8 +27,8 @@
 #  POSSIBILITY OF SUCH DAMAGE.
 #
 
-CLANG_TIDY_VERSION="LLVM version 9.0"
-CLANG_APPLY_REPLACEMENTS_VERSION="clang-apply-replacements version 9.0"
+CLANG_TIDY_VERSION="LLVM version 14.0"
+CLANG_APPLY_REPLACEMENTS_VERSION="clang-apply-replacements version 14.0"
 
 die()
 {
@@ -36,9 +36,9 @@ die()
     exit 1
 }
 
-# Search for clang-tidy-9
-if command -v clang-tidy-9 >/dev/null; then
-    clang_tidy=$(command -v clang-tidy-9)
+# Search for clang-tidy-14
+if command -v clang-tidy-14 >/dev/null; then
+    clang_tidy=$(command -v clang-tidy-14)
 elif command -v clang-tidy >/dev/null; then
     clang_tidy=$(command -v clang-tidy)
     case "$($clang_tidy --version)" in
@@ -49,12 +49,12 @@ elif command -v clang-tidy >/dev/null; then
             ;;
     esac
 else
-    die "clang-tidy 9.0 required"
+    die "clang-tidy 14.0 required"
 fi
 
-# Search for clang-apply-replacements-9
-if command -v clang-apply-replacements-9 >/dev/null; then
-    clang_apply_replacements=$(command -v clang-apply-replacements-9)
+# Search for clang-apply-replacements-14
+if command -v clang-apply-replacements-14 >/dev/null; then
+    clang_apply_replacements=$(command -v clang-apply-replacements-14)
 elif command -v clang-apply-replacements >/dev/null; then
     clang_apply_replacements=$(command -v clang-apply-replacements)
     case "$($clang_apply_replacements --version)" in
@@ -65,20 +65,20 @@ elif command -v clang-apply-replacements >/dev/null; then
             ;;
     esac
 else
-    die "clang-apply-replacements 9.0 required"
+    die "clang-apply-replacements 14.0 required"
 fi
 
-# Search for run-clang-tidy-9.py
-if command -v run-clang-tidy-9.py >/dev/null; then
-    run_clang_tidy=$(command -v run-clang-tidy-9.py)
-elif command -v run-clang-tidy-9 >/dev/null; then
-    run_clang_tidy=$(command -v run-clang-tidy-9)
+# Search for run-clang-tidy-14.py
+if command -v run-clang-tidy-14.py >/dev/null; then
+    run_clang_tidy=$(command -v run-clang-tidy-14.py)
+elif command -v run-clang-tidy-14 >/dev/null; then
+    run_clang_tidy=$(command -v run-clang-tidy-14)
 elif command -v run-clang-tidy.py >/dev/null; then
     run_clang_tidy=$(command -v run-clang-tidy.py)
 elif command -v run-clang-tidy >/dev/null; then
     run_clang_tidy=$(command -v run-clang-tidy)
 else
-    die "run-clang-tidy.py 9.0 required"
+    die "run-clang-tidy.py 14.0 required"
 fi
 
 $run_clang_tidy -clang-tidy-binary "$clang_tidy" -clang-apply-replacements-binary "$clang_apply_replacements" "$@" || die