diff --git a/Dockerfile b/Dockerfile
index eb404af..9f6da98 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/urlstechie/urlchecker:0.0.31
+FROM ghcr.io/urlstechie/urlchecker:0.0.32
 COPY entrypoint.sh /entrypoint.sh
 WORKDIR /github/workspace
 ENTRYPOINT ["/bin/bash", "/entrypoint.sh"]
diff --git a/README.md b/README.md
index bfe5068..83a7fb3 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,7 @@ jobs:
 | `git_path`                  | <span style="color:green"> optional </span>  | A git url to clone, if the repository isn't already in $PWD                    |
 | `branch`                    | <span style="color:green"> optional </span>  | If we do a clone, clone this branch (defaults to master                        |
 | `cleanup`                   | <span style="color:green"> optional </span>  | If we do a clone, delete the cloned folder after (false)                       |
+| `serial`                    | <span style="color:green"> optional </span>  | Run in serial (good for debugging)                     |
 | `subfolder`                 | <span style="color:green"> optional </span>  | A subfolder to navigate to in the repository to check                          |
 | `file_types`                | <span style="color:green"> optional </span>  | A comma-separated list of file types to cover in the URLs checks.              |
 | `include_files`             | <span style="color:green"> optional </span>  | A comma-separated list of exact files to check.                                |
diff --git a/action.yml b/action.yml
index 5fc75fe..4fda049 100644
--- a/action.yml
+++ b/action.yml
@@ -45,6 +45,11 @@ inputs:
     required: false
     default: false
 
+  serial:
+    description: "Run in serial (good for debugging)"
+    required: false
+    default: false
+
   retry_count:
     description: "If a request fails, retry this number of times. Defaults to 1"
     required: false
diff --git a/entrypoint.sh b/entrypoint.sh
index dfd45c5..107ed36 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -37,6 +37,12 @@ if [ "${INPUT_VERBOSE}" == "true" ]; then
     COMMAND="${COMMAND} --verbose"
 fi
 
+# run in serial for debugging?
+if [ "${INPUT_SERIAL}" == "true" ]; then
+    COMMAND="${COMMAND} --serial"
+fi
+
+
 # Do we have a number of workers defined?
 if [ ! -z "${INPUT_WORKERS}" ]; then
     export URLCHECKER_WORKERS=${INPUT_WORKERS}