diff --git a/dreamplace/params.json b/dreamplace/params.json
index 8ea4d64..3b87e87 100644
--- a/dreamplace/params.json
+++ b/dreamplace/params.json
@@ -275,15 +275,15 @@
     "required" : "required for timing-driven mode"
     },
 "use_bb" : {
-    "descripton" : "whether use bb step", 
+    "description" : "whether use bb step", 
     "default" : 0
     }, 
 "macro_place_flag" : {
-        "descripton" : "whether enable macro placement", 
+        "description" : "whether enable macro placement", 
         "default" : 0
     },
 "two_stage_density_scaler" : {
-        "descripton" : "scale density weight after macro place", 
+        "description" : "scale density weight after macro place", 
         "default" : 1000
     },
 "macro_halo_x": {