diff --git a/ReleaseNotes/release_notes.md b/ReleaseNotes/release_notes.md
index b2b45b75..4be6dad0 100644
--- a/ReleaseNotes/release_notes.md
+++ b/ReleaseNotes/release_notes.md
@@ -3,9 +3,11 @@
   1. add `RooDataSet` -> `TTree` transformation
     
 ## Backward incompatible
-
+    
 ## Bug fixes
-
+    
+  1. fix `ostap-check-dependencies`
+    
 # v1.13.6.0
 
 ## New features
diff --git a/scripts/ostap-check-dependencies b/scripts/ostap-check-dependencies
index 872e5145..8d6a00a3 100755
--- a/scripts/ostap-check-dependencies
+++ b/scripts/ostap-check-dependencies
@@ -125,7 +125,7 @@ if python_info < ( 3 , 0 ) : # ================================================
         row = 'dbhash' , ''  , dbhash.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbhash' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -136,7 +136,7 @@ if python_info < ( 3 , 0 ) : # ================================================
         row = 'gdbm' , ''  , gdbm.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'gdbm' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -147,7 +147,7 @@ if python_info < ( 3 , 0 ) : # ================================================
         row = 'dbm' , ''  , dbm.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbm' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -158,7 +158,7 @@ if python_info < ( 3 , 0 ) : # ================================================
         row = 'dumbdbm' , ''  , dumbdbm.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dumbdbm' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -171,7 +171,7 @@ elif ( 3 , 13 ) <= python_info : # ============================================
         row = 'dbm.sqlite3' , ''  , dbm.sqlite3.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbm.sqlite3' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -184,7 +184,7 @@ if ( 3 , 0 ) <= python_info : # ===============================================
         row = 'dbm.gnu' , ''  , dbm.gnu.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbm.gnu' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -195,7 +195,7 @@ if ( 3 , 0 ) <= python_info : # ===============================================
         row = 'dbm.ndbm' , ''  , dbm.ndbm.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbm.ndbm' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -206,7 +206,7 @@ if ( 3 , 0 ) <= python_info : # ===============================================
         row = 'dbm.dumb' , ''  , dbm.dumb.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'dbm.dumb' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -219,7 +219,7 @@ if ( 3 , 3 ) <= python_info < ( 3 , 10) : # ===================================
         row = 'bsddb3' , ''  , bsddb3.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'bsddb3' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -232,7 +232,7 @@ if ( 3 , 6 ) <= python_info : # ===============================================
         row = 'berkeleydb' , berkeleydb.__version__  , berkeleydb.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'berkeleydb' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -245,10 +245,10 @@ if ( 3 , 8 ) <= python_info : # ===============================================
         row = 'tkrzw' , ''  , tkrzw.__file__
         rows.append  ( row )        
         # =====================================================================
-        except ImportError :
-            # =================================================================
-            row = attention ( 'tkrzw' ) , attention ( '---' ) , ''
-            rows.append  ( row )            
+    except ImportError : # ====================================================
+        # =====================================================================
+        row = attention ( 'tkrzw' ) , attention ( '---' ) , ''
+        rows.append  ( row )            
 # =============================================================================
 try : # =======================================================================
     # =========================================================================        
@@ -269,19 +269,19 @@ if ( 3 , 7 ) <= python_info : # ===============================================
         row = 'lmdb' , lmdb.__version__  , lmdb.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'lmdb' ) , attention ( '---' ) , ''
         rows.append  ( row )
-# ============================================================================
-try : # ======================================================================
-    # ========================================================================
+# =============================================================================
+try : # =======================================================================
+    # =========================================================================
     import pathos
     row = 'pathos' , pathos.__version__  , pathos.__file__
     rows.append  ( row )
-    # ========================================================================
-except ImportError : # =======================================================
-    # ========================================================================
+    # =========================================================================
+except ImportError : # ========================================================
+    # =========================================================================
     message = """pathos cannot be imported!
     Pathos is used for the paralellel ``cluster''-processing
     - see https://github.com/uqfoundation/pathos
@@ -412,7 +412,7 @@ if ( 3 , 8 ) <= python_info : # ===============================================
         row = 'zstandard' , zstandard.__version__  , zstandard.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'zstandard' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -425,7 +425,7 @@ if ( 3 , 3 ) <= python_info : # ===============================================
         row = 'lzma' , ''  , lzma.__file__
         rows.append  ( row )
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'lzma' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -441,7 +441,7 @@ if ( 3 , 9 ) <= python_info : # ===============================================
         row = 'terminaltables3' , terminaltables3.__version__  , terminaltables3.__file__
         rows.append  ( row )        
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'terminaltables3' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -454,7 +454,7 @@ if not has_tt3 : # ============================================================
         row = 'terminaltables' , terminaltables.__version__  , terminaltables.__file__
         rows.append  ( row )        
         # =====================================================================
-    except ImportError :
+    except ImportError : # ====================================================
         # =====================================================================
         row = attention ( 'terminaltables' ) , attention ( '---' ) , ''
         rows.append  ( row )
@@ -476,7 +476,7 @@ try : # =======================================================================
     row = 'hep_ml' , hep_ml.__version__  , hep_ml.__file__
     rows.append  ( row )
     # =========================================================================
-except ImportError :
+except ImportError : # ========================================================
     # =========================================================================
     message = """hep_ml cannot be imported! 
     hep_ml is recommended for very efficitnt multidimensional reweighting"""