diff --git a/changelog.md b/changelog.md
index f28c2d1..192331a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2025-04-25 - 6.2.2 - fix(docs)
+Update @push.rocks/tapbundle dependency and refine AsyncExecutionStack documentation examples
+
+- Bump @push.rocks/tapbundle from ^5.0.8 to ^5.5.6 in package.json
+- Improve README documentation for AsyncExecutionStack with clearer examples for exclusive and non-exclusive task execution
+- Demonstrate usage of concurrency controls in AsyncExecutionStack
+
 ## 2025-04-25 - 6.2.1 - fix(AsyncExecutionStack tests)
 Refactor AsyncExecutionStack tests: update non-exclusive concurrency assertions and clean up test logic
 
diff --git a/package.json b/package.json
index d419400..df0f907 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "@git.zone/tsbundle": "^2.0.15",
     "@git.zone/tsrun": "^1.2.44",
     "@git.zone/tstest": "^1.0.90",
-    "@push.rocks/tapbundle": "^5.0.8",
+    "@push.rocks/tapbundle": "^5.5.6",
     "@types/node": "^22.13.9"
   },
   "dependencies": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1dc1ad9..8932fe2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -46,7 +46,7 @@ importers:
         specifier: ^1.0.90
         version: 1.0.96(@aws-sdk/credential-providers@3.758.0)(socks@2.8.4)(typescript@5.7.3)
       '@push.rocks/tapbundle':
-        specifier: ^5.0.8
+        specifier: ^5.5.6
         version: 5.5.6(@aws-sdk/credential-providers@3.758.0)(socks@2.8.4)
       '@types/node':
         specifier: ^22.13.9
diff --git a/readme.md b/readme.md
index f4c56e9..7a66185 100644
--- a/readme.md
+++ b/readme.md
@@ -17,22 +17,53 @@ This will download `@push.rocks/lik` and add it to your project's `package.json`
 
 ### AsyncExecutionStack
 
-`AsyncExecutionStack` allows for managing asynchronous task execution with exclusive and non-exclusive slots, ensuring effective handling of resource-intensive operations.
+`AsyncExecutionStack` provides controlled execution of asynchronous tasks in two modes:
+
+- **Exclusive tasks**: run one at a time in insertion order, blocking all other tasks until complete.
+- **Non-exclusive tasks**: run in parallel, up to an optional concurrency limit.
+
+Create a stack:
 
 ```typescript
 import { AsyncExecutionStack } from '@push.rocks/lik';
 
-const myAsyncStack = new AsyncExecutionStack();
+const stack = new AsyncExecutionStack();
+```
 
-// Exclusive execution ensures this task doesn't run in parallel with others
-await myAsyncStack.getExclusiveExecutionSlot(async () => {
-  // some asynchronous operation
-}, 2500);
+Exclusive tasks execute sequentially and block subsequent tasks (with an optional timeout):
 
-// Non-exclusive slots can run in parallel
-myAsyncStack.getNonExclusiveExecutionSlot(async () => {
-  // another asynchronous operation
-}, 1500);
+```typescript
+await stack.getExclusiveExecutionSlot(
+  async () => {
+    // exclusive work
+  },
+  5000 // optional timeout in milliseconds
+);
+```
+
+Non-exclusive tasks run in parallel up to the concurrency limit (default: unlimited). Each call returns a promise you can await:
+
+```typescript
+const p1 = stack.getNonExclusiveExecutionSlot(async () => {
+  // work 1
+}, 2000);
+
+const p2 = stack.getNonExclusiveExecutionSlot(async () => {
+  // work 2
+}, 2000);
+
+await Promise.all([p1, p2]);
+```
+
+Control concurrency and inspect status:
+
+```typescript
+// Set maximum concurrent non-exclusive tasks (minimum 1)
+stack.setNonExclusiveMaxConcurrency(3);
+
+console.log(stack.getNonExclusiveMaxConcurrency()); // 3
+console.log(stack.getActiveNonExclusiveCount());    // currently running tasks
+console.log(stack.getPendingNonExclusiveCount());   // tasks waiting for slots
 ```
 
 ### FastMap
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 9516470..7ce243c 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/lik',
-  version: '6.2.1',
+  version: '6.2.2',
   description: 'Provides a collection of lightweight helpers and utilities for Node.js projects.'
 }