diff --git a/backends/arm/_passes/arm_pass_utils.py b/backends/arm/_passes/arm_pass_utils.py
index 280864cbc91..3fcf724e5b6 100644
--- a/backends/arm/_passes/arm_pass_utils.py
+++ b/backends/arm/_passes/arm_pass_utils.py
@@ -5,6 +5,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import Optional
 
 import torch
diff --git a/backends/arm/_passes/cast_int64_pass.py b/backends/arm/_passes/cast_int64_pass.py
index 6bdbca62879..a9952edec3c 100644
--- a/backends/arm/_passes/cast_int64_pass.py
+++ b/backends/arm/_passes/cast_int64_pass.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import torch
 from executorch.exir.pass_base import ExportPass, PassResult
 
diff --git a/backends/arm/_passes/conv1d_unsqueeze_pass.py b/backends/arm/_passes/conv1d_unsqueeze_pass.py
index 7fe5c6f7b6d..158e4bf452c 100644
--- a/backends/arm/_passes/conv1d_unsqueeze_pass.py
+++ b/backends/arm/_passes/conv1d_unsqueeze_pass.py
@@ -5,6 +5,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import torch
 from executorch.backends.arm._passes.arm_pass_utils import (
diff --git a/backends/arm/_passes/decompose_div_pass.py b/backends/arm/_passes/decompose_div_pass.py
index 5cdc79c1c3e..893531dac69 100644
--- a/backends/arm/_passes/decompose_div_pass.py
+++ b/backends/arm/_passes/decompose_div_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import torch
 from executorch.exir.dialects._ops import ops as exir_ops
 from executorch.exir.pass_base import ExportPass
diff --git a/backends/arm/_passes/decompose_layernorm_pass.py b/backends/arm/_passes/decompose_layernorm_pass.py
index 193f4d85039..3739337101e 100644
--- a/backends/arm/_passes/decompose_layernorm_pass.py
+++ b/backends/arm/_passes/decompose_layernorm_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import operator
 
 import torch
diff --git a/backends/arm/_passes/decompose_linear_pass.py b/backends/arm/_passes/decompose_linear_pass.py
index 30767b354d3..42c2c8c6be9 100644
--- a/backends/arm/_passes/decompose_linear_pass.py
+++ b/backends/arm/_passes/decompose_linear_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import numpy as np
 from executorch.backends.arm._passes.arm_pass_utils import (
     create_node,
diff --git a/backends/arm/_passes/decompose_meandim_pass.py b/backends/arm/_passes/decompose_meandim_pass.py
index e9df7aaf6df..d927fd613cc 100644
--- a/backends/arm/_passes/decompose_meandim_pass.py
+++ b/backends/arm/_passes/decompose_meandim_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import torch
 from executorch.exir.dialects._ops import ops as exir_ops
 from executorch.exir.pass_base import ExportPass
diff --git a/backends/arm/_passes/decompose_softmaxes_pass.py b/backends/arm/_passes/decompose_softmaxes_pass.py
index a5af062e7ba..b4804d8bfc6 100644
--- a/backends/arm/_passes/decompose_softmaxes_pass.py
+++ b/backends/arm/_passes/decompose_softmaxes_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import torch
 from executorch.exir.dialects._ops import ops as exir_ops
 from executorch.exir.pass_base import ExportPass
diff --git a/backends/arm/_passes/decompose_var_pass.py b/backends/arm/_passes/decompose_var_pass.py
index 226b086c7d7..cc8f0eb6da5 100644
--- a/backends/arm/_passes/decompose_var_pass.py
+++ b/backends/arm/_passes/decompose_var_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import torch
 from executorch.exir.dialects._ops import ops as exir_ops
diff --git a/backends/arm/_passes/insert_squeeze_after_sum_pass.py b/backends/arm/_passes/insert_squeeze_after_sum_pass.py
index adf2b4f491c..e088c2e35a3 100644
--- a/backends/arm/_passes/insert_squeeze_after_sum_pass.py
+++ b/backends/arm/_passes/insert_squeeze_after_sum_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import cast
 
 import torch
diff --git a/backends/arm/_passes/match_arg_ranks_pass.py b/backends/arm/_passes/match_arg_ranks_pass.py
index dcdcc13794f..e230fde1a05 100644
--- a/backends/arm/_passes/match_arg_ranks_pass.py
+++ b/backends/arm/_passes/match_arg_ranks_pass.py
@@ -5,6 +5,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import cast
 
 from executorch.backends.arm._passes.arm_pass_utils import (
diff --git a/backends/arm/_passes/remove_clone_pass.py b/backends/arm/_passes/remove_clone_pass.py
index 174b090630c..ac992ce2a0c 100644
--- a/backends/arm/_passes/remove_clone_pass.py
+++ b/backends/arm/_passes/remove_clone_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from executorch.exir.dialects._ops import ops as exir_ops
 from executorch.exir.pass_base import ExportPass
 
diff --git a/backends/arm/_passes/scalars_to_attribute_pass.py b/backends/arm/_passes/scalars_to_attribute_pass.py
index f1c3297165f..a689799ed6e 100644
--- a/backends/arm/_passes/scalars_to_attribute_pass.py
+++ b/backends/arm/_passes/scalars_to_attribute_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import cast, Union
 
 import torch
diff --git a/backends/arm/_passes/unsqueeze_scalar_placeholders_pass.py b/backends/arm/_passes/unsqueeze_scalar_placeholders_pass.py
index ad9844b5269..084bd46456d 100644
--- a/backends/arm/_passes/unsqueeze_scalar_placeholders_pass.py
+++ b/backends/arm/_passes/unsqueeze_scalar_placeholders_pass.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import torch
 from executorch.exir.pass_base import ExportPass, PassResult
 
diff --git a/backends/arm/operators/op_reciprocal.py b/backends/arm/operators/op_reciprocal.py
index 774c4d94b19..2f2758b0f55 100644
--- a/backends/arm/operators/op_reciprocal.py
+++ b/backends/arm/operators/op_reciprocal.py
@@ -2,6 +2,8 @@
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
+
+# pyre-unsafe
 from typing import List
 
 import numpy as np
diff --git a/backends/arm/operators/op_select.py b/backends/arm/operators/op_select.py
index 6037ed000c9..77875507d98 100644
--- a/backends/arm/operators/op_select.py
+++ b/backends/arm/operators/op_select.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import List
 
 import serializer.tosa_serializer as ts
diff --git a/backends/arm/operators/op_sum.py b/backends/arm/operators/op_sum.py
index b67f5f92db0..26d29f5179b 100644
--- a/backends/arm/operators/op_sum.py
+++ b/backends/arm/operators/op_sum.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import cast, List
 
 import executorch.backends.arm.tosa_quant_utils as tqutils
diff --git a/backends/arm/operators/op_transpose.py b/backends/arm/operators/op_transpose.py
index b427b3f5bf3..8d08d6f3b98 100644
--- a/backends/arm/operators/op_transpose.py
+++ b/backends/arm/operators/op_transpose.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import List
 
 import serializer.tosa_serializer as ts
diff --git a/backends/arm/operators/op_upsample_nearest2d.py b/backends/arm/operators/op_upsample_nearest2d.py
index c6c0423a1ac..50a2d1d1851 100644
--- a/backends/arm/operators/op_upsample_nearest2d.py
+++ b/backends/arm/operators/op_upsample_nearest2d.py
@@ -2,6 +2,8 @@
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
+
+# pyre-unsafe
 from typing import List
 
 import serializer.tosa_serializer as ts
diff --git a/backends/arm/process_node.py b/backends/arm/process_node.py
index 9a3874c37e9..2d3a0c2786c 100644
--- a/backends/arm/process_node.py
+++ b/backends/arm/process_node.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 #
+
+# pyre-unsafe
 from typing import cast, Dict
 
 import numpy as np
diff --git a/backends/arm/quantizer/quantization_annotation/mul_annotator.py b/backends/arm/quantizer/quantization_annotation/mul_annotator.py
index 47190d380e0..3a206c3aba8 100644
--- a/backends/arm/quantizer/quantization_annotation/mul_annotator.py
+++ b/backends/arm/quantizer/quantization_annotation/mul_annotator.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 from typing import Callable, List, Optional
 
 import torch
diff --git a/backends/arm/quantizer/quantization_annotation/upsample_nearest2d_annotator.py b/backends/arm/quantizer/quantization_annotation/upsample_nearest2d_annotator.py
index 9d73da5bc0f..eb4daf3a5c3 100644
--- a/backends/arm/quantizer/quantization_annotation/upsample_nearest2d_annotator.py
+++ b/backends/arm/quantizer/quantization_annotation/upsample_nearest2d_annotator.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import itertools
 from typing import Callable, List, Optional