diff --git a/.github/unittest/linux_examples/scripts/run_all.sh b/.github/unittest/linux_examples/scripts/run_all.sh
index 37719e51074..18e6075baae 100755
--- a/.github/unittest/linux_examples/scripts/run_all.sh
+++ b/.github/unittest/linux_examples/scripts/run_all.sh
@@ -150,15 +150,15 @@ git submodule sync && git submodule update --init --recursive
 printf "Installing PyTorch with %s\n" "${CU_VERSION}"
 if [[ "$TORCH_VERSION" == "nightly" ]]; then
   if [ "${CU_VERSION:-}" == cpu ] ; then
-      pip3 install --pre torch torchvision --index-url https://download.pytorch.org/whl/nightly/cpu -U
+      pip3 install --pre torch torchvision numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/nightly/cpu -U
   else
-      pip3 install --pre torch torchvision --index-url https://download.pytorch.org/whl/nightly/$CU_VERSION
+      pip3 install --pre torch torchvision numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/nightly/$CU_VERSION
   fi
 elif [[ "$TORCH_VERSION" == "stable" ]]; then
     if [ "${CU_VERSION:-}" == cpu ] ; then
-      pip3 install torch torchvision --index-url https://download.pytorch.org/whl/cpu
+      pip3 install torch torchvision numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/cpu
   else
-      pip3 install torch torchvision --index-url https://download.pytorch.org/whl/$CU_VERSION
+      pip3 install torch torchvision numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/$CU_VERSION
   fi
 else
   printf "Failed to install pytorch"
diff --git a/.github/unittest/linux_libs/scripts_rlhf/install.sh b/.github/unittest/linux_libs/scripts_rlhf/install.sh
index d0363186c1a..4c769ba9bd6 100755
--- a/.github/unittest/linux_libs/scripts_rlhf/install.sh
+++ b/.github/unittest/linux_libs/scripts_rlhf/install.sh
@@ -31,15 +31,15 @@ git submodule sync && git submodule update --init --recursive
 printf "Installing PyTorch with cu121"
 if [[ "$TORCH_VERSION" == "nightly" ]]; then
   if [ "${CU_VERSION:-}" == cpu ] ; then
-      pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cpu -U
+      pip3 install --pre torch numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/nightly/cpu -U
   else
-      pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu121 -U
+      pip3 install --pre torch numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/nightly/cu121 -U
   fi
 elif [[ "$TORCH_VERSION" == "stable" ]]; then
     if [ "${CU_VERSION:-}" == cpu ] ; then
-      pip3 install torch --index-url https://download.pytorch.org/whl/cpu
+      pip3 install torch numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/cpu
   else
-      pip3 install torch --index-url https://download.pytorch.org/whl/cu121
+      pip3 install torch numpy==1.26.4 numpy-base<2.0 --index-url https://download.pytorch.org/whl/cu121
   fi
 else
   printf "Failed to install pytorch"
diff --git a/torchrl/objectives/common.py b/torchrl/objectives/common.py
index 766e674eb77..27b2b86b7cf 100644
--- a/torchrl/objectives/common.py
+++ b/torchrl/objectives/common.py
@@ -12,7 +12,6 @@
 from dataclasses import dataclass
 from typing import Iterator, List, Optional, Tuple
 
-import torch.compiler
 from tensordict import is_tensor_collection, TensorDict, TensorDictBase
 
 from tensordict.nn import TensorDictModule, TensorDictModuleBase, TensorDictParams
@@ -25,12 +24,17 @@
 from torchrl.objectives.utils import RANDOM_MODULE_LIST, ValueEstimators
 from torchrl.objectives.value import ValueEstimatorBase
 
+try:
+    from torch.compiler import is_dynamo_compiling
+except ImportError:
+    from torch._dynamo import is_compiling as is_dynamo_compiling
+
 
 def _updater_check_forward_prehook(module, *args, **kwargs):
     if (
         not all(module._has_update_associated.values())
         and RL_WARNINGS
-        and not torch.compiler.is_dynamo_compiling()
+        and not is_dynamo_compiling()
     ):
         warnings.warn(
             module.TARGET_NET_WARNING,
@@ -425,7 +429,7 @@ def __getattr__(self, item):
             elif (
                 not self._has_update_associated[item[7:-7]]
                 and RL_WARNINGS
-                and not torch.compiler.is_dynamo_compiling()
+                and not is_dynamo_compiling()
             ):
                 # no updater associated
                 warnings.warn(
diff --git a/torchrl/objectives/ppo.py b/torchrl/objectives/ppo.py
index 5758b1ed7d8..83da183148e 100644
--- a/torchrl/objectives/ppo.py
+++ b/torchrl/objectives/ppo.py
@@ -804,7 +804,12 @@ def __init__(
             clip_value=clip_value,
             **kwargs,
         )
-        self.register_buffer("clip_epsilon", torch.tensor(clip_epsilon))
+        for p in self.parameters():
+            device = p.device
+            break
+        else:
+            device = None
+        self.register_buffer("clip_epsilon", torch.tensor(clip_epsilon, device=device))
 
     @property
     def _clip_bounds(self):