diff --git a/action.yml b/action.yml
index 87682af..521b253 100644
--- a/action.yml
+++ b/action.yml
@@ -72,6 +72,17 @@ inputs:
     description: "Manually specify the desired increment"
     required: false
   check_consistency:
-    default: false
+    default: 'false'
     description: "check consistency among versions defined in commitizen configuration and version_files"
     required: false
+  gpg_sign:
+    description: >
+      If true, use GPG to sign commits and tags (for git operations). Requires separate
+      setup of GPG key and passphrase in GitHub Actions (e.g. with the action
+      crazy-max/ghaction-import-gpg)
+    required: false
+    default: "false"
+  debug:
+    description: "If true, prints debug output to GitHub Actions stdout."
+    required: false
+    default: "false"
diff --git a/entrypoint.sh b/entrypoint.sh
index fb5979e..af63f3e 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,7 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
+gpg --version
+
 if [[ -z $INPUT_GITHUB_TOKEN ]]; then
   echo 'Missing input "github_token: ${{ secrets.GITHUB_TOKEN }}".' >&2
   exit 1
@@ -29,10 +31,16 @@ echo "Commitizen version: $(cz version)"
 PREV_REV="$(cz version --project)"
 
 CZ_CMD=('cz')
+if [[ $INPUT_DEBUG == 'true' ]]; then
+  CZ_CMD+=('--debug')
+fi
 if [[ $INPUT_NO_RAISE ]]; then
   CZ_CMD+=('--no-raise' "$INPUT_NO_RAISE")
 fi
 CZ_CMD+=('bump' '--yes')
+if [[ $INPUT_GPG_SIGN == 'true' ]]; then
+  CZ_CMD+=('--gpg-sign')
+fi
 if [[ $INPUT_DRY_RUN == 'true' ]]; then
   CZ_CMD+=('--dry-run')
 fi