diff --git a/README.md b/README.md
index c8d614a..fcc67ed 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ jobs:
         github_token: ${{ secrets.GITHUB_TOKEN }}
 ```
 
-You can provide optional arguments to specify paths, exclude paths,
+You can provide optional arguments to specify paths, exclude paths, extensions of tested files,
 a config file, Verible version and extra arguments for ``verible-verilog-lint``.
 
 ```yaml
@@ -49,6 +49,11 @@ a config file, Verible version and extra arguments for ``verible-verilog-lint``.
       ./rtl/some_file
     extra_args: "--check_syntax=true"
     verible_version: "v0.0-3100-gd75b1c47"
+    extensions: |
+      .sv
+      .v
+      .vh
+      .svh
     github_token: ${{ secrets.GITHUB_TOKEN }}
 ```
 
diff --git a/action.py b/action.py
index 9dde1e1..4515c4e 100755
--- a/action.py
+++ b/action.py
@@ -48,14 +48,14 @@ def unwrap_from_gha_string(args):
     return elements
 
 
-def find_sources_in_paths(paths):
-    '''Scan {paths} for Verilog and SystemVerilog files
+def find_sources_in_paths(paths, exts):
+    '''Scan {paths} for files with extensions from set
     '''
     files = set()
     for filename in paths:
         # check if filename is a directory or a source file
         if os.path.isdir(filename):
-            new_files = recursive_find({".v", ".sv"}, filename)
+            new_files = recursive_find(exts, filename)
             files.update(new_files)
         elif os.path.isfile(filename):
             files.add(filename)
@@ -72,12 +72,14 @@ def find_sources_in_paths(paths):
               help='extra options for the linter')
 @click.option('--exclude-paths', '-x', required=False,
               help='exclude these paths from the files to lint')
+@click.option('--extensions', '-t', type=str, required=False,
+              help='lint files with these extensions (starting with a dot, split by comma)')
 @click.option('--log-file', '-l', type=str, required=False,
               help='log file name')
 @click.option('--patch', '-p', type=str, required=False,
               help='patch file name')
 @click.argument('path', nargs=-1, required=True)
-def main(conf_file, extra_opts, exclude_paths, log_file, patch, path):
+def main(conf_file, extra_opts, exclude_paths, extensions, log_file, patch, path):
     '''
     Lint .v and .sv files specified in PATHs
     '''
@@ -96,9 +98,14 @@ def main(conf_file, extra_opts, exclude_paths, log_file, patch, path):
     else:
         patch = []
 
+    if extensions:
+        extensions = set(ext if ext.startswith('.') else '.' + ext for ext in extensions.split())
+    else:
+        extensions = {'.v', '.sv'}
+
     paths = unwrap_from_gha_string(path)
     # set of target files to lint
-    files = find_sources_in_paths(paths)
+    files = find_sources_in_paths(paths, extensions)
 
     if exclude_paths:
         for p in exclude_paths.split():
diff --git a/action.yml b/action.yml
index 1617401..4499b92 100644
--- a/action.yml
+++ b/action.yml
@@ -16,6 +16,10 @@ inputs:
   exclude_paths:
     description: 'Exclude these paths after finding all target files'
     required: false
+  extensions:
+    description: 'Run linting on files ending with following extensions'
+    required: false
+    default: ''
   log_file:
     description: 'Name for a log file'
     required: false
@@ -66,6 +70,7 @@ runs:
         INPUT_CONFIG_FILE: ${{ inputs.config_file }}
         INPUT_EXCLUDE_PATHS: ${{ inputs.exclude_paths }}
         INPUT_EXTRA_ARGS: ${{ inputs.extra_args }}
+        INPUT_EXTENSIONS: ${{ inputs.extensions }}
         INPUT_FAIL_ON_ERROR: ${{ inputs.fail_on_error }}
         INPUT_GITHUB_TOKEN: ${{ inputs.github_token }}
         INPUT_LOG_FILE: ${{ inputs.log_file }}
diff --git a/entrypoint.sh b/entrypoint.sh
index 7fca4ea..e04fd3f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -41,6 +41,7 @@ if [ "$INPUT_SUGGEST_FIXES" = "true" ]; then
     --conf-file "$INPUT_CONFIG_FILE" \
     --extra-opts "$INPUT_EXTRA_ARGS" \
     --exclude-paths "$INPUT_EXCLUDE_PATHS" \
+    --extensions "$INPUT_EXTENSIONS" \
     --log-file "$INPUT_LOG_FILE" \
     --patch "$patch" \
     "$INPUT_PATHS"
@@ -55,6 +56,7 @@ else
     --conf-file "$INPUT_CONFIG_FILE" \
     --extra-opts "$INPUT_EXTRA_ARGS" \
     --exclude-paths "$INPUT_EXCLUDE_PATHS" \
+    --extensions "$INPUT_EXTENSIONS" \
     --log-file "$INPUT_LOG_FILE" \
     "$INPUT_PATHS"