diff --git a/doctr/models/detection/fast/base.py b/doctr/models/detection/fast/base.py
index dcea87549..10ce7d302 100644
--- a/doctr/models/detection/fast/base.py
+++ b/doctr/models/detection/fast/base.py
@@ -153,7 +153,7 @@ class _FAST(BaseModel):
 
     min_size_box: int = 3
     assume_straight_pages: bool = True
-    shrink_ratio = 0.1
+    shrink_ratio = 0.4
 
     def build_target(
         self,
diff --git a/doctr/models/detection/fast/pytorch.py b/doctr/models/detection/fast/pytorch.py
index e5b7bcfc9..3e3ed3f0e 100644
--- a/doctr/models/detection/fast/pytorch.py
+++ b/doctr/models/detection/fast/pytorch.py
@@ -122,7 +122,7 @@ def __init__(
         bin_thresh: float = 0.3,
         box_thresh: float = 0.1,
         dropout_prob: float = 0.1,
-        pooling_size: int = 9,
+        pooling_size: int = 4,
         assume_straight_pages: bool = True,
         exportable: bool = False,
         cfg: Optional[Dict[str, Any]] = {},