diff --git a/tracker/tracker/CHANGELOG.md b/tracker/tracker/CHANGELOG.md
index 7357d657f..4ee13ee24 100644
--- a/tracker/tracker/CHANGELOG.md
+++ b/tracker/tracker/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 - fix webworker writer re-init request
 - remove useless logs
+- added gzip compression to large messages
 - tune mouse thrashing detection
 
 # 6.0.0
diff --git a/tracker/tracker/src/main/app/index.ts b/tracker/tracker/src/main/app/index.ts
index 833cb3aeb..368f1a0ca 100644
--- a/tracker/tracker/src/main/app/index.ts
+++ b/tracker/tracker/src/main/app/index.ts
@@ -7,7 +7,7 @@ import Sanitizer from './sanitizer.js'
 import Ticker from './ticker.js'
 import Logger, { LogLevel } from './logger.js'
 import Session from './session.js'
-import { gzip, gunzip } from 'fflate'
+import { gzip } from 'fflate'
 import { deviceMemory, jsHeapSizeLimit } from '../modules/performance.js'
 
 import type { Options as ObserverOptions } from './observer/top_observer.js'