diff --git a/.env.sample b/.env.sample
index 2f8fdd74..efbdd12e 100644
--- a/.env.sample
+++ b/.env.sample
@@ -20,6 +20,8 @@ JWT_SECRET_REFRESH_TOKEN=abacaba
 # JWT secret for user's access token
 JWT_SECRET_ACCESS_TOKEN=belarus
 
+# max document could for one read request to the database
+MAX_DB_READ_BATCH_SIZE=100000
 
 # JWT secret for signing tokens for processing billing requests
 JWT_SECRET_BILLING_CHECKSUM=checksum_secret
diff --git a/package.json b/package.json
index 8ab87869..2a6f2a42 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hawk.api",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "main": "index.ts",
   "license": "BUSL-1.1",
   "scripts": {
diff --git a/src/models/eventsFactory.js b/src/models/eventsFactory.js
index d294043b..d341366c 100644
--- a/src/models/eventsFactory.js
+++ b/src/models/eventsFactory.js
@@ -7,7 +7,7 @@ const Event = require('../models/event');
 const { ObjectID } = require('mongodb');
 const { composeEventPayloadByRepetition } = require('../utils/merge');
 
-const MAX_DB_READ_BATCH_SIZE = 80000;
+const MAX_DB_READ_BATCH_SIZE = process.env.MAX_DB_READ_BATCH_SIZE;
 
 /**
  * @typedef {import('mongodb').UpdateWriteOpResult} UpdateWriteOpResult