diff --git a/pkg/spxrpc/place_stream_server.go b/pkg/spxrpc/place_stream_server.go
index 5a74f5bd..6dfabf3f 100644
--- a/pkg/spxrpc/place_stream_server.go
+++ b/pkg/spxrpc/place_stream_server.go
@@ -4,11 +4,12 @@ import (
 	"context"
 	"time"
 
+	"github.com/bluesky-social/indigo/util"
 	placestreamtypes "stream.place/streamplace/pkg/streamplace"
 )
 
 func (s *Server) handlePlaceStreamServerGetServerTime(ctx context.Context) (*placestreamtypes.ServerGetServerTime_Output, error) {
-	serverTime := time.Now().UTC().Format(time.RFC3339)
+	serverTime := time.Now().UTC().Format(util.ISO8601)
 	return &placestreamtypes.ServerGetServerTime_Output{
 		ServerTime: serverTime,
 	}, nil