diff --git a/packages/check-pid-file/CHANGELOG.md b/packages/check-pid-file/CHANGELOG.md
index ec6964167..b21c05e82 100644
--- a/packages/check-pid-file/CHANGELOG.md
+++ b/packages/check-pid-file/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+### [1.0.1](https://www.github.com/sounisi5011/npm-packages/compare/check-pid-file-v1.0.0...check-pid-file-v1.0.1) (2021-11-27)
+
+
+### Bug Fixes
+
+* **check-pid-file:** allow `undefined` in optional properties ([#271](https://www.github.com/sounisi5011/npm-packages/issues/271)) ([9d2d17a](https://www.github.com/sounisi5011/npm-packages/commit/9d2d17a3e4166dd58e4a3106e00fe18e62a66f26))
+
 ## 1.0.0 (2021-06-24)
 
 
diff --git a/packages/check-pid-file/package.json b/packages/check-pid-file/package.json
index 483fb2154..357b93531 100644
--- a/packages/check-pid-file/package.json
+++ b/packages/check-pid-file/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sounisi5011/check-pid-file",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Use the PID file to check which processes have already started and prevent multiple executions",
   "keywords": [
     "daemon",