diff --git a/README.md b/README.md
index d3004f9..129b9cb 100644
--- a/README.md
+++ b/README.md
@@ -8,15 +8,15 @@ that locks closed issues and pull requests after a period of inactivity.
 
 ## Supporting the Project
 
-Lock Threads is an MIT-licensed open source project. Its ongoing
-development is made possible thanks to the support of awesome backers.
-If you'd like to join them, please consider contributing with
-[Patreon](https://goo.gl/qRhKSW), [PayPal](https://goo.gl/5FnBaw)
-or [Bitcoin](https://goo.gl/uJUAaU).
+The continued development of Lock Threads is made possible
+thanks to the support of awesome backers. If you'd like to join them,
+please consider contributing with [Patreon](https://goo.gl/qRhKSW),
+[PayPal](https://goo.gl/5FnBaw) or [Bitcoin](https://goo.gl/uJUAaU).
 
 ## Usage
 
 1. **[Install the GitHub App](https://github.com/apps/lock)**
+   for the required repositories
 2. Create `.github/lock.yml` based on the template below
 3. It will start scanning for closed issues and/or pull requests within an hour
 
diff --git a/assets/app-description.md b/assets/app-description.md
index 62d5105..455db5d 100644
--- a/assets/app-description.md
+++ b/assets/app-description.md
@@ -4,7 +4,7 @@ A GitHub App that locks closed issues and pull requests after a period of inacti
 
 ## Usage
 
-1. **[Install the GitHub App](https://github.com/apps/lock)**
+1. **[Install the GitHub App](https://github.com/apps/lock)** for the required repositories
 2. Create `.github/lock.yml` based on the template below
 3. It will start scanning for closed issues and/or pull requests within an hour
 
@@ -45,4 +45,4 @@ lockComment: >
 
 ## Supporting the Project
 
-Lock Threads is an MIT-licensed open source project. Its ongoing development is made possible thanks to the support of awesome backers. If you'd like to join them, please consider contributing with [Patreon](https://goo.gl/qRhKSW), [PayPal](https://goo.gl/5FnBaw) or [Bitcoin](https://goo.gl/uJUAaU).
+The continued development of Lock Threads is made possible thanks to the support of awesome backers. If you'd like to join them, please consider contributing with [Patreon](https://goo.gl/qRhKSW), [PayPal](https://goo.gl/5FnBaw) or [Bitcoin](https://goo.gl/uJUAaU).
diff --git a/package.json b/package.json
index d957e48..e9ef9cc 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,8 @@
   "dependencies": {
     "joi": "^13.3.0",
     "probot": "^6.2.0",
-    "probot-scheduler": "^1.1.0"
+    "probot-scheduler": "^1.1.0",
+    "uuid": "^3.2.1"
   },
   "devDependencies": {
     "nodemon": "1.17.5",
diff --git a/src/index.js b/src/index.js
index 112c5c2..bbb0b03 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,3 +1,4 @@
+const uuidV4 = require('uuid/v4');
 const createScheduler = require('probot-scheduler');
 
 const App = require('./lock');
@@ -7,39 +8,37 @@ module.exports = robot => {
   scheduler = createScheduler(robot);
 
   robot.on('schedule.repository', async context => {
-    const app = await getApp(context);
+    const logger = robot.log.child({task: uuidV4()});
+    const app = await getApp(context, logger);
     if (app) {
-      const {only: type} = app.config;
-      if (type) {
-        await app.lock(type);
-      } else {
-        await app.lock('issues');
-        await app.lock('pulls');
-      }
+      await app.lockThreads();
     }
   });
 
-  async function getApp(context) {
-    const config = await getConfig(context);
-    if (config) {
-      return new App(context, config, robot.log);
+  async function getApp(context, logger = robot.log) {
+    const config = await getConfig(context, logger);
+    if (config && config.perform) {
+      return new App(context, config, logger);
     }
   }
 
-  async function getConfig(context) {
-    const {owner, repo} = context.issue();
+  async function getConfig(context, logger) {
     let config;
+    const configFile = 'lock.yml';
+    const repo = context.repo();
     try {
-      const repoConfig = await context.config('lock.yml');
-      if (repoConfig) {
-        const {error, value} = schema.validate(repoConfig);
-        if (error) {
-          throw error;
-        }
-        config = value;
+      const repoConfig = await context.config(configFile);
+      if (!repoConfig) {
+        logger.warn({repo, configFile}, 'Missing config');
+        repoConfig = {perform: false};
       }
+      const {error, value} = schema.validate(repoConfig);
+      if (error) {
+        throw error;
+      }
+      config = value;
     } catch (err) {
-      robot.log.warn({err: new Error(err), owner, repo}, 'Invalid config');
+      logger.warn({err: new Error(err), repo, configFile}, 'Invalid config');
     }
 
     return config;
diff --git a/src/lock.js b/src/lock.js
index a8538e4..6df4676 100644
--- a/src/lock.js
+++ b/src/lock.js
@@ -2,42 +2,47 @@ module.exports = class Lock {
   constructor(context, config, logger) {
     this.context = context;
     this.config = config;
-    this.logger = logger;
+    this.log = logger;
+  }
+
+  async lockThreads() {
+    const {only: type} = this.config;
+    if (type) {
+      await this.lock(type);
+    } else {
+      await this.lock('issues');
+      await this.lock('pulls');
+    }
   }
 
   async lock(type) {
-    const {owner, repo} = this.context.repo();
+    const repo = this.context.repo();
     const lockLabel = this.getConfigValue(type, 'lockLabel');
     const lockComment = this.getConfigValue(type, 'lockComment');
 
-    const issues = await this.getLockableIssues(type);
-    for (const issue of issues) {
-      const issueUrl = `${owner}/${repo}/issues/${issue.number}`;
+    const results = await this.getLockableIssues(type);
+    for (const result of results) {
+      const issue = {...repo, number: result.number};
+
       if (lockComment) {
-        this.logger.info(`[${issueUrl}] Commenting`);
+        this.log.info({issue}, 'Commenting');
         await this.context.github.issues.createComment({
-          owner,
-          repo,
-          number: issue.number,
+          ...issue,
           body: lockComment
         });
       }
 
       if (lockLabel) {
-        this.logger.info(`[${issueUrl}] Labeling`);
+        this.log.info({issue}, 'Labeling');
         await this.context.github.issues.addLabels({
-          owner,
-          repo,
-          number: issue.number,
+          ...issue,
           labels: [lockLabel]
         });
       }
 
-      this.logger.info(`[${issueUrl}] Locking`);
+      this.log.info({issue}, 'Locking');
       await this.context.github.issues.lock({
-        owner,
-        repo,
-        number: issue.number,
+        ...issue,
         lock_reason: 'resolved',
         headers: {
           accept: 'application/vnd.github.sailor-v-preview+json'
@@ -66,7 +71,7 @@ module.exports = class Lock {
       query += ' is:pr';
     }
 
-    this.logger.info(`[${owner}/${repo}] Searching ${type}`);
+    this.log.info({repo: {owner, repo}}, `Searching ${type}`);
     return this.context.github.search.issues({
       q: query,
       sort: 'updated',
diff --git a/src/schema.js b/src/schema.js
index 7beb395..b8aecc8 100644
--- a/src/schema.js
+++ b/src/schema.js
@@ -38,7 +38,8 @@ const schema = Joi.object().keys({
     .valid('issues', 'pulls')
     .description('Limit to only `issues` or `pulls`'),
   pulls: Joi.object().keys(fields),
-  issues: Joi.object().keys(fields)
+  issues: Joi.object().keys(fields),
+  perform: Joi.boolean().default(!process.env.DRY_RUN)
 });
 
 module.exports = schema;
diff --git a/yarn.lock b/yarn.lock
index 8c178c4..51e1448 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4181,6 +4181,10 @@ uuid@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
 
+uuid@^3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.2.1.tgz#12c528bb9d58d0b9265d9a2f6f0fe8be17ff1f14"
+
 validate-npm-package-license@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz#2804babe712ad3379459acfbe24746ab2c303fbc"