diff --git a/src/Simplex/Chat/Call.hs b/src/Simplex/Chat/Call.hs
index 827953a24..a0f3707dd 100644
--- a/src/Simplex/Chat/Call.hs
+++ b/src/Simplex/Chat/Call.hs
@@ -12,6 +12,7 @@ import qualified Data.Aeson as J
 import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.ByteString.Char8 (ByteString)
 import Data.Int (Int64)
+import Data.Text (Text)
 import GHC.Generics (Generic)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
@@ -176,8 +177,8 @@ instance ToJSON CallExtraInfo where
   toEncoding = J.genericToEncoding J.defaultOptions
 
 data WebRTCSession = WebRTCSession
-  { rtcSession :: J.Value,
-    rtcIceCandidates :: [J.Value]
+  { rtcSession :: Text,
+    rtcIceCandidates :: [Text]
   }
   deriving (Eq, Show, Generic, FromJSON)
 
@@ -186,7 +187,7 @@ instance ToJSON WebRTCSession where
   toEncoding = J.genericToEncoding J.defaultOptions
 
 data WebRTCExtraInfo = WebRTCExtraInfo
-  { rtcIceCandidates :: [J.Value]
+  { rtcIceCandidates :: [Text]
   }
   deriving (Eq, Show, Generic, FromJSON)
 
diff --git a/tests/ChatTests.hs b/tests/ChatTests.hs
index 58edeac5f..068b8551e 100644
--- a/tests/ChatTests.hs
+++ b/tests/ChatTests.hs
@@ -9,7 +9,7 @@ import ChatClient
 import Control.Concurrent (threadDelay)
 import Control.Concurrent.Async (concurrently_)
 import Control.Concurrent.STM
-import Data.Aeson (ToJSON, (.=))
+import Data.Aeson (ToJSON)
 import qualified Data.Aeson as J
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as LB
@@ -1774,8 +1774,8 @@ testCallType = CallType {media = CMVideo, capabilities = CallCapabilities {encry
 testWebRTCSession :: WebRTCSession
 testWebRTCSession =
   WebRTCSession
-    { rtcSession = J.object ["test" .= (123 :: Int)],
-      rtcIceCandidates = []
+    { rtcSession = "{}",
+      rtcIceCandidates = [""]
     }
 
 testWebRTCCallOffer :: WebRTCCallOffer