diff --git a/dnn/scripts/opr_param_defs.py b/dnn/scripts/opr_param_defs.py
index 38dfe14b..f1aa516c 100755
--- a/dnn/scripts/opr_param_defs.py
+++ b/dnn/scripts/opr_param_defs.py
@@ -745,13 +745,20 @@ pdef('Sleep').add_fields('float32', Doc('time', 'time to sleep in seconds'), 0)
      'dtype', Doc('dtype', 'data type of output value'),
      'DTypeEnum::Float32'))
 
-(pdef('UniformRNG').
+(pdef('UniformRNG', version=0, is_legacy=True).
+ add_fields('uint64', 'seed', 0))
+
+(pdef('UniformRNG', version=1).
  add_fields('uint64', 'seed', 0).
  add_fields(
      'dtype', Doc('dtype', 'The dtype of output Tensor. Only support Float32.'),
      'DTypeEnum::Float32'))
 
-(pdef('GaussianRNG').
+(pdef('GaussianRNG', version=0, is_legacy=True).
+ add_fields('uint64', 'seed', 0).
+ add_fields('float32', 'mean', 0, 'std', 1))
+
+(pdef('GaussianRNG', version=1).
  add_fields('uint64', 'seed', 0).
  add_fields('float32', 'mean', 0, 'std', 1).
  add_fields(
diff --git a/src/opr/impl/rand.oprdecl b/src/opr/impl/rand.oprdecl
index 860095c1..763fcd1f 100644
--- a/src/opr/impl/rand.oprdecl
+++ b/src/opr/impl/rand.oprdecl
@@ -1,12 +1,12 @@
 decl_opr('UniformRNG', pyname='_uniform_rng',
          inputs=['shape'],
          params='UniformRNG',
-         canonize_input_vars='canonize_shape_input')
+         canonize_input_vars='canonize_shape_input', version=1)
 
 decl_opr('GaussianRNG', pyname='_gaussian_rng',
          inputs=['shape'],
          params='GaussianRNG',
-         canonize_input_vars='canonize_shape_input')
+         canonize_input_vars='canonize_shape_input', version=1)
 
 inputs = [
     Doc('shape',
diff --git a/src/opr/impl/rand.sereg.h b/src/opr/impl/rand.sereg.h
index 315b6975..8c5c6c22 100644
--- a/src/opr/impl/rand.sereg.h
+++ b/src/opr/impl/rand.sereg.h
@@ -13,18 +13,21 @@
 #include "megbrain/serialization/sereg.h"
 
 namespace mgb {
+
+
 namespace opr {
 
-    MGB_SEREG_OPR(UniformRNG, 1);
-    MGB_SEREG_OPR(GaussianRNG, 1);
-    MGB_SEREG_OPR(GammaRNG, 2);
-    MGB_SEREG_OPR(PoissonRNG, 1);
-    MGB_SEREG_OPR(PermutationRNG, 1);
-    MGB_SEREG_OPR(BetaRNG, 2);
+using UniformRNGV1 = opr::UniformRNG;
+MGB_SEREG_OPR(UniformRNGV1, 1);
+using GaussianRNGV1 = opr::GaussianRNG;
+MGB_SEREG_OPR(GaussianRNGV1, 1);
+MGB_SEREG_OPR(GammaRNG, 2);
+MGB_SEREG_OPR(PoissonRNG, 1);
+MGB_SEREG_OPR(PermutationRNG, 1);
+MGB_SEREG_OPR(BetaRNG, 2);
 
 } // namespace opr
 } // namespace mgb
 
-
 // vim: ft=cpp syntax=cpp.doxygen foldmethod=marker foldmarker=f{{{,f}}}