diff --git a/cells/conb/sky130_fd_sc_lp__conb_0.lef b/cells/conb/sky130_fd_sc_lp__conb_0.lef
index ad6180d..e80a40f 100644
--- a/cells/conb/sky130_fd_sc_lp__conb_0.lef
+++ b/cells/conb/sky130_fd_sc_lp__conb_0.lef
@@ -19,8 +19,7 @@
 BUSBITCHARS "[]" ;
 DIVIDERCHAR "/" ;
 MACRO sky130_fd_sc_lp__conb_0
-  CLASS CORE TIELOW ;
-  CLASS CORE TIEHIGH ;
+  CLASS CORE ;
   SOURCE USER ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.440000 BY  3.330000 ;
diff --git a/cells/conb/sky130_fd_sc_lp__conb_0.magic.lef b/cells/conb/sky130_fd_sc_lp__conb_0.magic.lef
index ac375b4..486feb3 100644
--- a/cells/conb/sky130_fd_sc_lp__conb_0.magic.lef
+++ b/cells/conb/sky130_fd_sc_lp__conb_0.magic.lef
@@ -23,7 +23,7 @@
   DATABASE MICRONS 200 ;
 END UNITS
 MACRO sky130_fd_sc_lp__conb_0
-  CLASS CORE TIEHIGH ;
+  CLASS CORE ;
   FOREIGN sky130_fd_sc_lp__conb_0 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.440000 BY  3.330000 ;
diff --git a/cells/conb/sky130_fd_sc_lp__conb_1.lef b/cells/conb/sky130_fd_sc_lp__conb_1.lef
index ebfad64..f9ac7bb 100644
--- a/cells/conb/sky130_fd_sc_lp__conb_1.lef
+++ b/cells/conb/sky130_fd_sc_lp__conb_1.lef
@@ -19,8 +19,7 @@
 BUSBITCHARS "[]" ;
 DIVIDERCHAR "/" ;
 MACRO sky130_fd_sc_lp__conb_1
-  CLASS CORE TIELOW ;
-  CLASS CORE TIEHIGH ;
+  CLASS CORE ;
   SOURCE USER ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.440000 BY  3.330000 ;
diff --git a/cells/conb/sky130_fd_sc_lp__conb_1.magic.lef b/cells/conb/sky130_fd_sc_lp__conb_1.magic.lef
index 98c6302..22e44c0 100644
--- a/cells/conb/sky130_fd_sc_lp__conb_1.magic.lef
+++ b/cells/conb/sky130_fd_sc_lp__conb_1.magic.lef
@@ -23,7 +23,7 @@
   DATABASE MICRONS 200 ;
 END UNITS
 MACRO sky130_fd_sc_lp__conb_1
-  CLASS CORE TIEHIGH ;
+  CLASS CORE ;
   FOREIGN sky130_fd_sc_lp__conb_1 ;
   ORIGIN  0.000000  0.000000 ;
   SIZE  1.440000 BY  3.330000 ;