diff --git a/log-warper.cabal b/log-warper.cabal
--- a/log-warper.cabal
+++ b/log-warper.cabal
@@ -1,5 +1,5 @@
 name:                log-warper
-version:             0.4.1
+version:             0.4.2
 synopsis:            Flexible, configurable, monadic and pretty logging
 homepage:            https://github.com/serokell/log-warper
 license:             MIT
diff --git a/src/System/Wlog/Formatter.hs b/src/System/Wlog/Formatter.hs
--- a/src/System/Wlog/Formatter.hs
+++ b/src/System/Wlog/Formatter.hs
@@ -39,11 +39,11 @@
 stderrFormatter :: LogFormatter a
 stderrFormatter =
     simpleLogFormatter $
-        mconcat [colorizer ERROR "[$loggername:$prio] ", timeFmt, "$msg"]
+        mconcat [colorizer ERROR "[$loggername:$prio:$tid] ", timeFmt, "$msg"]
 
 stdoutFmt :: Priority -> Bool -> String
 stdoutFmt pr isShowTime = mconcat
-    [colorizer pr "[$loggername:$prio] ", timeFmtStdout isShowTime, "$msg"]
+    [colorizer pr "[$loggername:$prio:$tid] ", timeFmtStdout isShowTime, "$msg"]
 
 stdoutFormatter :: Bool -> LogFormatter a
 stdoutFormatter isShowTime handle r@(pr, _) =