diff --git a/changelog.md b/changelog.md
index 3051ee3..37ecb96 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2025-08-30 - 5.4.1 - fix(processmonitor)
+Bump tsbuild devDependency and relax ps-tree callback typing in ProcessMonitor
+
+- Update devDependency @git.zone/tsbuild from ^2.6.7 to ^2.6.8
+- Change psTree callback types in ts/daemon/processmonitor.ts to accept any error and ReadonlyArray for children to improve type compatibility
+
 ## 2025-08-30 - 5.4.0 - feat(daemon)
 Add CLI systemd service refresh on version mismatch and fix daemon memory leak; update dependencies
 
diff --git a/package.json b/package.json
index b442ef6..395a9ac 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "tspm": "./cli.js"
   },
   "devDependencies": {
-    "@git.zone/tsbuild": "^2.6.7",
+    "@git.zone/tsbuild": "^2.6.8",
     "@git.zone/tsbundle": "^2.5.1",
     "@git.zone/tsrun": "^1.2.46",
     "@git.zone/tstest": "^2.3.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 37c2ad8..42e59bf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -49,8 +49,8 @@ importers:
         version: 4.20.5
     devDependencies:
       '@git.zone/tsbuild':
-        specifier: ^2.6.7
-        version: 2.6.7
+        specifier: ^2.6.8
+        version: 2.6.8
       '@git.zone/tsbundle':
         specifier: ^2.5.1
         version: 2.5.1
@@ -536,8 +536,8 @@ packages:
   '@esm-bundle/chai@4.3.4-fix.0':
     resolution: {integrity: sha512-26SKdM4uvDWlY8/OOOxSB1AqQWeBosCX3wRYUZO7enTAj03CtVxIiCimYVG2WpULcyV51qapK4qTovwkUr5Mlw==}
 
-  '@git.zone/tsbuild@2.6.7':
-    resolution: {integrity: sha512-nLRYk1V4gxdEAp5mbLYNdr/in9mFA26L4MPKBKqzASID4lXSYya5sDbLRdDTv+mD0ZRBgdn6e+WMylA0SU4hSw==}
+  '@git.zone/tsbuild@2.6.8':
+    resolution: {integrity: sha512-g1z7+MxiYD0xMfuqn8NSWitbfK1OaF0Qolmw7WOmUsHmNF60T1AR02Lo4DtNmnjSpchA+xzDFAQzL1xTcQA39w==}
     hasBin: true
 
   '@git.zone/tsbundle@2.5.1':
@@ -775,8 +775,8 @@ packages:
   '@push.rocks/isounique@1.0.5':
     resolution: {integrity: sha512-Z0BVqZZOCif1THTbIKWMgg0wxCzt9CyBtBBqQJiZ+jJ0KlQFrQHNHrPt81/LXe/L4x0cxWsn0bpL6W5DNSvNLw==}
 
-  '@push.rocks/levelcache@3.1.1':
-    resolution: {integrity: sha512-+JpDNEt+EuvmbtADGH9SkODxBy+slHDDzs43mAbuMbwpVvi6uNuMK0Mkhrfz9UFpxUSp+cJE/jl/OxdpD0xL1A==}
+  '@push.rocks/levelcache@3.2.0':
+    resolution: {integrity: sha512-Ch0Oguta2I0SVi704kHghhBcgfyfS92ua1elRu9d8X1/9LMRYuqvvBAnyXyFxQzI3S8q8QC6EkRdd8CAAYSzRg==}
 
   '@push.rocks/lik@6.1.0':
     resolution: {integrity: sha512-BoSAIRFNryQ8Sd5EP+35ZBj6vAQ1C60/XjZIO2O65XDyLG8xz7xJ+u5Wm8/fjIJ0WX3h8GkkaCz2tJM34nFT3A==}
@@ -811,6 +811,9 @@ packages:
   '@push.rocks/smartcache@1.0.16':
     resolution: {integrity: sha512-UAXf74eDuH4/RebJhydIbHlYVR3ACYJjniEY/9ZePblu7bIPgwFZqLBE9g1lcKVogbH9yY62dk3rSpgBzenyfQ==}
 
+  '@push.rocks/smartcache@1.0.18':
+    resolution: {integrity: sha512-3+cmLu9chbnmi4yD4kjlFP/Tn4NReaZIoicEcGTtwbcokTrSDMs3YPdJzIpDZkAs83PW7OcVSHa3Ak5KU5OWzA==}
+
   '@push.rocks/smartchok@1.1.1':
     resolution: {integrity: sha512-WmNigGmn1muBJMANVuJb4F8x3TzgYrnn6YZm6ixTsG+0WFbYevivEwp+J4S7npobLHsR7ynf+Ky8LxRYmsL50A==}
 
@@ -838,6 +841,9 @@ packages:
   '@push.rocks/smartenv@5.0.13':
     resolution: {integrity: sha512-ACXmUcHZHl2CF2jnVuRw9saRRrZvJblCRs2d+K5aLR1DfkYFX3eA21kcMlKeLisI3aGNbIj9vz/rowN5qkRkfA==}
 
+  '@push.rocks/smarterror@2.0.1':
+    resolution: {integrity: sha512-iCcH1D8tlDJgMFsaJ6lhdOTKhbU0KoprNv9MRP9o7691QOx4JEDXiHtr/lNtxVo8BUtdb9CF6kazaknO9KuORA==}
+
   '@push.rocks/smartexit@1.0.23':
     resolution: {integrity: sha512-WmwKYcwbHBByoABhHHB+PAjr5475AtD/xBh1mDcqPrFsOOUOZq3BBUdpq25wI3ccu/SZB5IwaimiVzadls6HkA==}
 
@@ -1018,6 +1024,9 @@ packages:
   '@push.rocks/tapbundle@6.0.3':
     resolution: {integrity: sha512-SuP14V6TPdtd1y1CYTvwTKJdpHa7EzY55NfaaEMxW4oRKvHgJiOiPEiR/IrtL9tSiDMSfrx12waTMgZheYaBug==}
 
+  '@push.rocks/taskbuffer@3.1.10':
+    resolution: {integrity: sha512-jT+FxRSk0+IP17q9LD1/Ks8GJBn5TZWgLtfnKRHW/LAZ1bHX/2ARZvAV8fm1T4WMU5s7PyId+y4fkoohG/5Nkg==}
+
   '@push.rocks/taskbuffer@3.1.7':
     resolution: {integrity: sha512-QktGVJPucqQmW/QNGnscf4FAigT1H7JWKFGFdRuDEaOHKFh9qN+PXG3QY7DtZ4jfXdGLxPN4yAufDuPSAJYFnw==}
 
@@ -5611,7 +5620,7 @@ snapshots:
     dependencies:
       '@types/chai': 4.3.20
 
-  '@git.zone/tsbuild@2.6.7':
+  '@git.zone/tsbuild@2.6.8':
     dependencies:
       '@git.zone/tspublish': 1.10.3
       '@push.rocks/early': 4.0.4
@@ -6027,21 +6036,21 @@ snapshots:
 
   '@push.rocks/isounique@1.0.5': {}
 
-  '@push.rocks/levelcache@3.1.1':
+  '@push.rocks/levelcache@3.2.0':
     dependencies:
       '@push.rocks/lik': 6.2.2
       '@push.rocks/smartbucket': 3.3.10
-      '@push.rocks/smartcache': 1.0.16
+      '@push.rocks/smartcache': 1.0.18
       '@push.rocks/smartenv': 5.0.13
       '@push.rocks/smartexit': 1.0.23
       '@push.rocks/smartfile': 11.2.7
       '@push.rocks/smartjson': 5.0.20
-      '@push.rocks/smartpath': 5.1.0
+      '@push.rocks/smartpath': 6.0.0
       '@push.rocks/smartpromise': 4.2.3
       '@push.rocks/smartstring': 4.0.15
       '@push.rocks/smartunique': 3.0.9
-      '@push.rocks/taskbuffer': 3.1.7
-      '@tsclass/tsclass': 4.4.4
+      '@push.rocks/taskbuffer': 3.1.10
+      '@tsclass/tsclass': 9.2.0
     transitivePeerDependencies:
       - aws-crt
 
@@ -6170,6 +6179,14 @@ snapshots:
       '@pushrocks/smartpromise': 3.1.10
       '@pushrocks/smarttime': 4.0.1
 
+  '@push.rocks/smartcache@1.0.18':
+    dependencies:
+      '@push.rocks/smartdelay': 3.0.5
+      '@push.rocks/smarterror': 2.0.1
+      '@push.rocks/smarthash': 3.2.3
+      '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smarttime': 4.1.1
+
   '@push.rocks/smartchok@1.1.1':
     dependencies:
       '@push.rocks/lik': 6.2.2
@@ -6249,6 +6266,11 @@ snapshots:
     dependencies:
       '@push.rocks/smartpromise': 4.2.3
 
+  '@push.rocks/smarterror@2.0.1':
+    dependencies:
+      clean-stack: 1.3.0
+      make-error-cause: 2.3.0
+
   '@push.rocks/smartexit@1.0.23':
     dependencies:
       '@push.rocks/lik': 6.1.0
@@ -6455,7 +6477,7 @@ snapshots:
   '@push.rocks/smartnpm@2.0.6':
     dependencies:
       '@push.rocks/consolecolor': 2.0.3
-      '@push.rocks/levelcache': 3.1.1
+      '@push.rocks/levelcache': 3.2.0
       '@push.rocks/smartarchive': 4.2.2
       '@push.rocks/smartfile': 11.2.7
       '@push.rocks/smartpath': 6.0.0
@@ -6757,6 +6779,16 @@ snapshots:
       - supports-color
       - utf-8-validate
 
+  '@push.rocks/taskbuffer@3.1.10':
+    dependencies:
+      '@push.rocks/lik': 6.2.2
+      '@push.rocks/smartdelay': 3.0.5
+      '@push.rocks/smartlog': 3.1.8
+      '@push.rocks/smartpromise': 4.2.3
+      '@push.rocks/smartrx': 3.0.10
+      '@push.rocks/smarttime': 4.1.1
+      '@push.rocks/smartunique': 3.0.9
+
   '@push.rocks/taskbuffer@3.1.7':
     dependencies:
       '@push.rocks/lik': 6.2.2
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 8cc04c7..3001c07 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tspm',
-  version: '5.4.0',
+  version: '5.4.1',
   description: 'a no fuzz process manager'
 }
diff --git a/ts/daemon/processmonitor.ts b/ts/daemon/processmonitor.ts
index 3aa4bf8..be7a188 100644
--- a/ts/daemon/processmonitor.ts
+++ b/ts/daemon/processmonitor.ts
@@ -311,7 +311,7 @@ export class ProcessMonitor extends EventEmitter {
 
       plugins.psTree(
         pid,
-        (err: Error | null, children: Array<{ PID: string }>) => {
+        (err: any, children: ReadonlyArray<{ PID: string }>) => {
           if (err) {
             const processError = new ProcessError(
               `Failed to get process tree: ${err.message}`,