diff --git a/configs/libra_rcnn/libra_fast_rcnn_r50_fpn_1x.py b/configs/libra_rcnn/libra_fast_rcnn_r50_fpn_1x.py
index 30189a46a1a38094461a8fefb5f84dba01056dc8..68ff1be7fa5d33918fca0b79b11ccd070216a53d 100644
--- a/configs/libra_rcnn/libra_fast_rcnn_r50_fpn_1x.py
+++ b/configs/libra_rcnn/libra_fast_rcnn_r50_fpn_1x.py
@@ -62,8 +62,8 @@ train_cfg = dict(
             pos_sampler=dict(type='InstanceBalancedPosSampler'),
             neg_sampler=dict(
                 type='IoUBalancedNegSampler',
-                floor=-1,
-                floor_thr=0,
+                floor_thr=-1,
+                floor_fraction=0,
                 num_bins=3)),
         pos_weight=-1,
         debug=False))
diff --git a/configs/libra_rcnn/libra_faster_rcnn_r101_fpn_1x.py b/configs/libra_rcnn/libra_faster_rcnn_r101_fpn_1x.py
index 3b7b2fb43b32f44d24222be1d99418670533b0fd..7a31476af76c26623cebe3118252d949a0c03adf 100644
--- a/configs/libra_rcnn/libra_faster_rcnn_r101_fpn_1x.py
+++ b/configs/libra_rcnn/libra_faster_rcnn_r101_fpn_1x.py
@@ -97,8 +97,8 @@ train_cfg = dict(
             pos_sampler=dict(type='InstanceBalancedPosSampler'),
             neg_sampler=dict(
                 type='IoUBalancedNegSampler',
-                floor=-1,
-                floor_thr=0,
+                floor_thr=-1,
+                floor_fraction=0,
                 num_bins=3)),
         pos_weight=-1,
         debug=False))
diff --git a/configs/libra_rcnn/libra_faster_rcnn_r50_fpn_1x.py b/configs/libra_rcnn/libra_faster_rcnn_r50_fpn_1x.py
index cec4944e922a6201ff92d1a1b81350a557539961..d596903854c3e33a8a73e34f6ce34fccb4b379e4 100644
--- a/configs/libra_rcnn/libra_faster_rcnn_r50_fpn_1x.py
+++ b/configs/libra_rcnn/libra_faster_rcnn_r50_fpn_1x.py
@@ -97,8 +97,8 @@ train_cfg = dict(
             pos_sampler=dict(type='InstanceBalancedPosSampler'),
             neg_sampler=dict(
                 type='IoUBalancedNegSampler',
-                floor=-1,
-                floor_thr=0,
+                floor_thr=-1,
+                floor_fraction=0,
                 num_bins=3)),
         pos_weight=-1,
         debug=False))
diff --git a/configs/libra_rcnn/libra_faster_rcnn_x101_64x4d_fpn_1x.py b/configs/libra_rcnn/libra_faster_rcnn_x101_64x4d_fpn_1x.py
index 3b4a8e8ec539b96bced3065082322d26bf85248c..26172a486263d29c2b664e54a0d6bd81e99c5829 100644
--- a/configs/libra_rcnn/libra_faster_rcnn_x101_64x4d_fpn_1x.py
+++ b/configs/libra_rcnn/libra_faster_rcnn_x101_64x4d_fpn_1x.py
@@ -99,8 +99,8 @@ train_cfg = dict(
             pos_sampler=dict(type='InstanceBalancedPosSampler'),
             neg_sampler=dict(
                 type='IoUBalancedNegSampler',
-                floor=-1,
-                floor_thr=0,
+                floor_thr=-1,
+                floor_fraction=0,
                 num_bins=3)),
         pos_weight=-1,
         debug=False))