diff --git a/requirements.txt b/requirements.txt
index 81a7143..6ce2887 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-sacrud>=0.3.4
+sacrud>=0.3.5
 saexttype
 colander>=1.0b1
 deform>=2.0a2
diff --git a/sacrud_deform/__init__.py b/sacrud_deform/__init__.py
index 7ca702f..af6cfed 100644
--- a/sacrud_deform/__init__.py
+++ b/sacrud_deform/__init__.py
@@ -21,7 +21,7 @@
 from .widgets import HiddenCheckboxWidget
 
 
-class JSONType(colander.String):
+class JSONType(colander.SchemaType):
     def serialize(self, node, appstruct):
         if appstruct is colander.null:
             return colander.null
@@ -33,7 +33,6 @@ def deserialize(self, node, cstruct):
             return colander.null
 
         try:
-            return json.loads(cstruct)
             return cstruct
         except Exception:
             raise colander.Invalid(
diff --git a/setup.py b/setup.py
index 6e64f0f..4286fd0 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@ def read(name):
 
 setup(
     name='sacrud_deform',
-    version="0.1.1",
+    version="0.1.2",
     url='http://github.com/ITCase/sacrud_deform/',
     author='Svintsov Dmitry',
     author_email='root@uralbash.ru',