diff --git a/opentelemetry.cabal b/opentelemetry.cabal
--- a/opentelemetry.cabal
+++ b/opentelemetry.cabal
@@ -2,7 +2,7 @@
 name:                opentelemetry
 description:         The OpenTelemetry Haskell Client https://opentelemetry.io
 category:            OpenTelemetry
-version:             0.0.0.1
+version:             0.0.0.2
 license-file:        LICENSE
 license:             Apache-2.0
 author:              Dmitry Ivanov
diff --git a/src/OpenTelemetry/FileExporter.hs b/src/OpenTelemetry/FileExporter.hs
--- a/src/OpenTelemetry/FileExporter.hs
+++ b/src/OpenTelemetry/FileExporter.hs
@@ -31,7 +31,7 @@
           & concat
           & concat
    in printf
-        "{\"ph\":\"B\",\"name\":\"%s\",\"pid\":1,\"ts\":%d,\"tid\":%d,\"meta\":{%s}},{\"ph\":\"E\",\"name\":\"%s\",\"pid\":1,\"ts\":%d,\"tid\":%d},"
+        "{\"ph\":\"B\",\"name\":\"%s\",\"pid\":1,\"ts\":%d,\"tid\":%d,\"args\":{%s}},{\"ph\":\"E\",\"name\":\"%s\",\"pid\":1,\"ts\":%d,\"tid\":%d},"
         spanOperation
         (div spanStartedAt 1000)
         threadId