diff --git a/examples/FedSimSiam/client/python_env.yaml b/examples/FedSimSiam/client/python_env.yaml
index 9c084dbcb..f4cdc5c6f 100644
--- a/examples/FedSimSiam/client/python_env.yaml
+++ b/examples/FedSimSiam/client/python_env.yaml
@@ -9,6 +9,7 @@ dependencies:
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
   - fedn
diff --git a/examples/flower-client/client/python_env.yaml b/examples/flower-client/client/python_env.yaml
index 02e024a07..16879da90 100644
--- a/examples/flower-client/client/python_env.yaml
+++ b/examples/flower-client/client/python_env.yaml
@@ -10,7 +10,8 @@ dependencies:
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
   - fire==0.3.1
   - flwr-datasets[vision]==0.1.0
\ No newline at end of file
diff --git a/examples/huggingface/client/python_env.yaml b/examples/huggingface/client/python_env.yaml
index f57851f35..23052db0a 100644
--- a/examples/huggingface/client/python_env.yaml
+++ b/examples/huggingface/client/python_env.yaml
@@ -9,8 +9,9 @@ dependencies:
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
   - transformers
   - datasets
   - fedn
diff --git a/examples/mnist-pytorch-DPSGD/client/python_env.yaml b/examples/mnist-pytorch-DPSGD/client/python_env.yaml
index a8175e20c..c9341a6ef 100644
--- a/examples/mnist-pytorch-DPSGD/client/python_env.yaml
+++ b/examples/mnist-pytorch-DPSGD/client/python_env.yaml
@@ -5,11 +5,12 @@ build_dependencies:
   - wheel
 dependencies:
   - fedn
-  -  torch==2.4.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
+  - torch==2.4.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   # PyTorch macOS x86 builds deprecation
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
   - opacus
diff --git a/examples/mnist-pytorch/client/python_env.yaml b/examples/mnist-pytorch/client/python_env.yaml
index 7a5fd853f..642ed1cf0 100644
--- a/examples/mnist-pytorch/client/python_env.yaml
+++ b/examples/mnist-pytorch/client/python_env.yaml
@@ -10,5 +10,6 @@ dependencies:
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
diff --git a/examples/monai-2D-mednist/client/python_env.yaml b/examples/monai-2D-mednist/client/python_env.yaml
index 02316dbb0..49d371872 100644
--- a/examples/monai-2D-mednist/client/python_env.yaml
+++ b/examples/monai-2D-mednist/client/python_env.yaml
@@ -10,7 +10,8 @@ dependencies:
   - torch==2.2.2; sys_platform == "darwin" and platform_machine == "x86_64"
   - torchvision==0.19.1; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
   - torchvision==0.17.2; sys_platform == "darwin" and platform_machine == "x86_64"
-  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64") or (sys_platform == "win" or sys_platform == "linux")
-  - numpy==1.26.4; sys_platform == "darwin" and platform_machine == "x86_64"
+  - numpy==2.0.2; (sys_platform == "darwin" and platform_machine == "arm64" and python_version >= "3.9") or (sys_platform == "win" or sys_platform == "linux" and python_version >= "3.9")
+  - numpy==1.26.4; (sys_platform == "darwin" and platform_machine == "x86_64" and python_version >= "3.9")
+  - numpy==1.24.4; python_version == "3.8"
   - monai-weekly[pillow, tqdm]
   - scikit-learn