diff --git a/.aux/test_with_lcg b/.aux/test_with_lcg
index 1a6421c5..8923cec5 100755
--- a/.aux/test_with_lcg
+++ b/.aux/test_with_lcg
@@ -4,4 +4,4 @@ CMTCONFIG=$2
 source /cvmfs/sft.cern.ch/lcg/views/${LCG}/${CMTCONFIG}/setup.sh
 source build/INSTALL/thisostap.sh 
 cd build 
-ctest -N  && cmake .. -DCMAKE_INSTALL_PREFIX=./INSTALL/ && ctest -j4 -R toys --output-on-failure --test-output-size-failed=5000000
+ctest -N  && cmake .. -DCMAKE_INSTALL_PREFIX=./INSTALL/ && ctest -j4 --output-on-failure --test-output-size-failed=5000000
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd330ea1..c09cc8df 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,8 +22,8 @@ include(CTest)
 
 set(OSTAP_VERSION_MAJOR 1)
 set(OSTAP_VERSION_MINOR 13)
-set(OSTAP_VERSION_PATCH 0)
-set(OSTAP_VERSION_TWEAK 3)
+set(OSTAP_VERSION_PATCH 1)
+set(OSTAP_VERSION_TWEAK 0)
 
 set(OSTAP_VERSION ${OSTAP_VERSION_MAJOR}.${OSTAP_VERSION_MINOR}.${OSTAP_VERSION_PATCH}.${OSTAP_VERSION_TWEAK})
 
diff --git a/ReleaseNotes/release_notes.md b/ReleaseNotes/release_notes.md
index 8430a227..519e0e27 100644
--- a/ReleaseNotes/release_notes.md
+++ b/ReleaseNotes/release_notes.md
@@ -1,3 +1,5 @@
+# v1.13.1.0
+
 ## New features
     
   1. improve all toys machinery: toys, jackknife, bootstrapping and significance
diff --git a/ReleaseNotes/v1.13.1.0.md b/ReleaseNotes/v1.13.1.0.md
new file mode 100644
index 00000000..f96f85d9
--- /dev/null
+++ b/ReleaseNotes/v1.13.1.0.md
@@ -0,0 +1,21 @@
+# v1.13.1.0
+
+## New features
+    
+  1. improve all toys machinery: toys, jackknife, bootstrapping and significance
+  1. extend all tests for toys
+  1. add brute-force way to delete `RooDataSet` - needed for JAckknife and Bootstrap
+  1. add argument `delete=False` for `dataset.bootstrap` and `dataset.jackknife` method to delete the dataset        
+  1. add new test `test_fitting_dataset2.py` to test interference of memory and jackknife/bootstraping
+  1. extend and improve machinery for toys
+  1. add `std.string` and `std.string_view` into `string_types`
+  1. improve `attention` printout from `dataset/tree` method `project`
+            
+## Backward incompatible
+
+## Bug fixes
+    
+  1. fix the typo in `ostap/tools/tests/test_tools_reweight3.py`
+  1. tiny fix for `progress_bar`
+  1. tiny fix for `ostap.utils.basic.isatty`
+        
\ No newline at end of file
diff --git a/ostap/fitting/tests/test_fitting_toys_simfit.py b/ostap/fitting/tests/test_fitting_toys_simfit.py
index c78bc761..cfd0b205 100755
--- a/ostap/fitting/tests/test_fitting_toys_simfit.py
+++ b/ostap/fitting/tests/test_fitting_toys_simfit.py
@@ -51,8 +51,8 @@ def test_toys_simfit_1 () :
     ## high statistic, low-background "control channel"
     mean1  = 2.0
     sigma1 = 0.50
-    NS1    =   1000
-    NB1    =    250
+    NS1    = 1000
+    NB1    =  250
     
     for i in range ( NS1 )  :
         v1 = random.gauss( mean1 , sigma1 )
diff --git a/ostap/parallel/tests/test_parallel_toys.py b/ostap/parallel/tests/test_parallel_toys.py
index 50618496..99fcff4f 100755
--- a/ostap/parallel/tests/test_parallel_toys.py
+++ b/ostap/parallel/tests/test_parallel_toys.py
@@ -590,9 +590,6 @@ def test_db () :
     title = 'Memory usage for various toys'
     table = T.table ( rows , title = title , prefix = '# ' , alignment = 'lc' ) 
     logger.info ( '%s:\n%s' % ( title , table ) )
-
-    raise TypeError ('Exception!')
-
     
 
 # =============================================================================