diff --git a/protoc-gen-gripmock/server.tmpl b/protoc-gen-gripmock/server.tmpl
index d0efc55f..8085e476 100644
--- a/protoc-gen-gripmock/server.tmpl
+++ b/protoc-gen-gripmock/server.tmpl
@@ -16,9 +16,9 @@ import (
 	"log"
 	"net"
 	"net/http"
-	"encoding/json"
 
 	"github.com/gripmock/environment"
+	"github.com/gripmock/json"
 	jsonpb "google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
@@ -330,9 +330,10 @@ func findStub(ctx context.Context, conf environment.Config, service, method stri
         }
     }
 
+	var buffer bytes.Buffer
+
     // Convert the search result to JSON.
-    data, err := json.Marshal(searchStub.JSON200.Data)
-    if err != nil {
+    if err := json.Encode(&buffer, searchStub.JSON200.Data); err != nil {
         return err
     }
 
@@ -352,6 +353,6 @@ func findStub(ctx context.Context, conf environment.Config, service, method stri
     grpc.SetHeader(ctx, mdResp)
 
     // Unmarshal the search result into the output message.
-    return jsonpb.Unmarshal(data, out)
+    return jsonpb.Unmarshal(buffer.Bytes(), out)
 }
 {{ end }}