diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c8e0e163f9..e17a24220e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,7 @@ In the future, we will probably offer a way to explicitly choose which behaviour
 - server: add a new `/dev/rts_stats` endpoint, enabled when hasura is started with '+RTS -T'
 - server: re-enable a default HASURA_GRAPHQL_PG_CONN_LIFETIME of 10min
 - server: support for bigquery datasets
+- server: format the values of `injectEventContext` as hexadecimal string instead of integer (fix #6465)
 - console: add custom_column_names to track_table request with replaced invalid characters (#992)
 - console: add details button to the success notification to see inserted row
 - console: add request preview for REST endpoints
diff --git a/server/src-lib/Hasura/Tracing.hs b/server/src-lib/Hasura/Tracing.hs
index f3e180d999a..35da15993b1 100644
--- a/server/src-lib/Hasura/Tracing.hs
+++ b/server/src-lib/Hasura/Tracing.hs
@@ -247,8 +247,8 @@ extractHttpContext hdrs = do
 injectEventContext :: TraceContext -> J.Value
 injectEventContext TraceContext{..} =
   J.object
-    [ "trace_id" J..= tcCurrentTrace
-    , "span_id"  J..= tcCurrentSpan
+    [ "trace_id" J..= word64ToHex tcCurrentTrace
+    , "span_id"  J..= word64ToHex tcCurrentSpan
     ]
 
 -- | Extract a trace context from an event trigger payload.
@@ -256,9 +256,9 @@ extractEventContext :: J.Value -> IO (Maybe TraceContext)
 extractEventContext e = do
   freshSpanId <- liftIO Rand.randomIO
   pure $ TraceContext
-    <$> (e ^? JL.key "trace_context" . JL.key "trace_id" . JL._Integral)
+    <$> (hexToWord64 =<< e ^? JL.key "trace_context" . JL.key "trace_id" . JL._String)
     <*> pure freshSpanId
-    <*> pure (e ^? JL.key "trace_context" . JL.key "span_id" . JL._Integral)
+    <*> pure (hexToWord64 =<< e ^? JL.key "trace_context" . JL.key "span_id" . JL._String)
 
 -- | Perform HTTP request which supports Trace headers
 tracedHttpRequest