diff --git a/Dockerfile b/Dockerfile
index 81dc1b0..6268bc2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ RUN apt update && \
     clang-tidy-16 \
     clang-tidy-17 \
     clang-tidy-18 \
+    clang-tidy-19 \
     python3 \
     python3-pip \
     && rm -rf /var/lib/apt/lists/
diff --git a/README.md b/README.md
index 47cba70..df124bc 100644
--- a/README.md
+++ b/README.md
@@ -88,8 +88,8 @@ at once, so `clang-tidy-review` will only attempt to post the first
 - `base_dir`: Absolute path to initial working directory
   `GITHUB_WORKSPACE`.
   - default: `GITHUB_WORKSPACE`
-- `clang_tidy_version`: Version of clang-tidy to use; one of 14, 15, 16, 17, 18
-  - default: '18'
+- `clang_tidy_version`: Version of clang-tidy to use; one of 14, 15, 16, 17, 18, 19
+  - default: '19'
 - `clang_tidy_checks`: List of checks
   - default: `'-*,performance-*,readability-*,bugprone-*,clang-analyzer-*,cppcoreguidelines-*,mpi-*,misc-*'`
 - `config_file`: Path to clang-tidy config file, replaces `clang_tidy_checks`
diff --git a/action.yml b/action.yml
index df59943..4475011 100644
--- a/action.yml
+++ b/action.yml
@@ -18,8 +18,8 @@ inputs:
     default: ${{ github.workspace }}
     require: false
   clang_tidy_version:
-    description: 'Version of clang-tidy to use; one of 14, 15, 16, 17, 18'
-    default: '18'
+    description: 'Version of clang-tidy to use; one of 14, 15, 16, 17, 18, 19'
+    default: '19'
     required: false
   clang_tidy_checks:
     description: 'List of checks'