diff --git a/openlane/user_project_wrapper/config.json b/openlane/user_project_wrapper/config.json
index aed45b8..9f86c1a 100644
--- a/openlane/user_project_wrapper/config.json
+++ b/openlane/user_project_wrapper/config.json
@@ -43,6 +43,7 @@
     "FP_PDN_CORE_RING_HSPACING": 1.7,
     "FP_PDN_VWIDTH": 3.1,
     "FP_PDN_HWIDTH": 3.1,
+    "GRT_ADJUSTMENT": 0.8,
     "FP_PDN_VSPACING": "expr::(5 * $FP_PDN_CORE_RING_VWIDTH)",
     "FP_PDN_HSPACING": "expr::(5 * $FP_PDN_CORE_RING_HWIDTH)",
     "VDD_NETS": ["vccd1", "vccd2","vdda1","vdda2"],