diff --git a/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache b/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache
index 2371b4975b6..ce0db200000 100644
--- a/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache
+++ b/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache
@@ -28,8 +28,8 @@ aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.2.1"
-tox = ">=4.4.6"
-flake8 = ">=6.0.0"
+tox = ">=3.9.0"
+flake8 = ">=4.0.0"
 
 [build-system]
 requires = ["setuptools"]
diff --git a/samples/client/echo_api/python-nextgen/pyproject.toml b/samples/client/echo_api/python-nextgen/pyproject.toml
index d0b1274a98a..954dc0de05a 100644
--- a/samples/client/echo_api/python-nextgen/pyproject.toml
+++ b/samples/client/echo_api/python-nextgen/pyproject.toml
@@ -18,8 +18,8 @@ aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.2.1"
-tox = ">=4.4.6"
-flake8 = ">=6.0.0"
+tox = ">=3.9.0"
+flake8 = ">=4.0.0"
 
 [build-system]
 requires = ["setuptools"]
diff --git a/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml b/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
index 447122c7486..981eebf3c59 100644
--- a/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
+++ b/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
@@ -21,8 +21,8 @@ aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.2.1"
-tox = ">=4.4.6"
-flake8 = ">=6.0.0"
+tox = ">=3.9.0"
+flake8 = ">=4.0.0"
 
 [build-system]
 requires = ["setuptools"]
diff --git a/samples/openapi3/client/petstore/python-nextgen/pyproject.toml b/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
index 3ba7360599a..82e111dd60f 100644
--- a/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
+++ b/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
@@ -20,8 +20,8 @@ aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.2.1"
-tox = ">=4.4.6"
-flake8 = ">=6.0.0"
+tox = ">=3.9.0"
+flake8 = ">=4.0.0"
 
 [build-system]
 requires = ["setuptools"]