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 ce0db20000..1ab024d87f 100644
--- a/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache
+++ b/modules/openapi-generator/src/main/resources/python-nextgen/pyproject.mustache
@@ -23,7 +23,7 @@ tornado = ">=4.2,<5"
 pem = ">= 19.3.0"
 pycryptodome = ">= 3.9.0"
 {{/hasHttpSignatureMethods}}
-pydantic = ">= 1.10.5"
+pydantic = "^1.10.5"
 aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
diff --git a/modules/openapi-generator/src/main/resources/python-nextgen/requirements.mustache b/modules/openapi-generator/src/main/resources/python-nextgen/requirements.mustache
index b64659a0a9..e18a97e55f 100644
--- a/modules/openapi-generator/src/main/resources/python-nextgen/requirements.mustache
+++ b/modules/openapi-generator/src/main/resources/python-nextgen/requirements.mustache
@@ -1,7 +1,7 @@
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
 urllib3 >= 1.25.3
-pydantic >= 1.10.2
+pydantic >= 1.10.5, < 2
 aenum >= 3.1.11
 {{#asyncio}}
 aiohttp >= 3.0.0
diff --git a/modules/openapi-generator/src/main/resources/python-nextgen/setup.mustache b/modules/openapi-generator/src/main/resources/python-nextgen/setup.mustache
index 77760324f8..902163a1e1 100644
--- a/modules/openapi-generator/src/main/resources/python-nextgen/setup.mustache
+++ b/modules/openapi-generator/src/main/resources/python-nextgen/setup.mustache
@@ -29,7 +29,7 @@ REQUIRES = [
     "pem>=19.3.0",
     "pycryptodome>=3.9.0",
 {{/hasHttpSignatureMethods}}
-    "pydantic",
+    "pydantic >= 1.10.5, < 2",
     "aenum"
 ]
 
diff --git a/samples/client/echo_api/python-nextgen/pyproject.toml b/samples/client/echo_api/python-nextgen/pyproject.toml
index 954dc0de05..0a22d86748 100644
--- a/samples/client/echo_api/python-nextgen/pyproject.toml
+++ b/samples/client/echo_api/python-nextgen/pyproject.toml
@@ -13,7 +13,7 @@ python = "^3.7"
 
 urllib3 = ">= 1.25.3"
 python-dateutil = ">=2.8.2"
-pydantic = ">= 1.10.5"
+pydantic = "^1.10.5"
 aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
diff --git a/samples/client/echo_api/python-nextgen/requirements.txt b/samples/client/echo_api/python-nextgen/requirements.txt
index b98ff3e606..74ede174a0 100644
--- a/samples/client/echo_api/python-nextgen/requirements.txt
+++ b/samples/client/echo_api/python-nextgen/requirements.txt
@@ -1,5 +1,5 @@
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
 urllib3 >= 1.25.3
-pydantic >= 1.10.2
+pydantic >= 1.10.5, < 2
 aenum >= 3.1.11
diff --git a/samples/client/echo_api/python-nextgen/setup.py b/samples/client/echo_api/python-nextgen/setup.py
index 004666ab67..3915ce5c37 100644
--- a/samples/client/echo_api/python-nextgen/setup.py
+++ b/samples/client/echo_api/python-nextgen/setup.py
@@ -27,7 +27,7 @@ PYTHON_REQUIRES = ">=3.7"
 REQUIRES = [
     "urllib3 >= 1.25.3",
     "python-dateutil",
-    "pydantic",
+    "pydantic >= 1.10.5, < 2",
     "aenum"
 ]
 
diff --git a/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml b/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
index 981eebf3c5..6c4548406a 100644
--- a/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
+++ b/samples/openapi3/client/petstore/python-nextgen-aiohttp/pyproject.toml
@@ -16,7 +16,7 @@ python-dateutil = ">=2.8.2"
 aiohttp = ">= 3.8.4"
 pem = ">= 19.3.0"
 pycryptodome = ">= 3.9.0"
-pydantic = ">= 1.10.5"
+pydantic = "^1.10.5"
 aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
diff --git a/samples/openapi3/client/petstore/python-nextgen-aiohttp/requirements.txt b/samples/openapi3/client/petstore/python-nextgen-aiohttp/requirements.txt
index 1365d507af..8bb00c2c24 100644
--- a/samples/openapi3/client/petstore/python-nextgen-aiohttp/requirements.txt
+++ b/samples/openapi3/client/petstore/python-nextgen-aiohttp/requirements.txt
@@ -1,6 +1,6 @@
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
 urllib3 >= 1.25.3
-pydantic >= 1.10.2
+pydantic >= 1.10.5, < 2
 aenum >= 3.1.11
 aiohttp >= 3.0.0
diff --git a/samples/openapi3/client/petstore/python-nextgen-aiohttp/setup.py b/samples/openapi3/client/petstore/python-nextgen-aiohttp/setup.py
index 9d2c0b75b5..d584a44727 100644
--- a/samples/openapi3/client/petstore/python-nextgen-aiohttp/setup.py
+++ b/samples/openapi3/client/petstore/python-nextgen-aiohttp/setup.py
@@ -29,7 +29,7 @@ REQUIRES = [
     "aiohttp >= 3.0.0",
     "pem>=19.3.0",
     "pycryptodome>=3.9.0",
-    "pydantic",
+    "pydantic >= 1.10.5, < 2",
     "aenum"
 ]
 
diff --git a/samples/openapi3/client/petstore/python-nextgen/pyproject.toml b/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
index 82e111dd60..b31e894081 100644
--- a/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
+++ b/samples/openapi3/client/petstore/python-nextgen/pyproject.toml
@@ -15,7 +15,7 @@ urllib3 = ">= 1.25.3"
 python-dateutil = ">=2.8.2"
 pem = ">= 19.3.0"
 pycryptodome = ">= 3.9.0"
-pydantic = ">= 1.10.5"
+pydantic = "^1.10.5"
 aenum = ">=3.1.11"
 
 [tool.poetry.dev-dependencies]
diff --git a/samples/openapi3/client/petstore/python-nextgen/requirements.txt b/samples/openapi3/client/petstore/python-nextgen/requirements.txt
index b98ff3e606..74ede174a0 100755
--- a/samples/openapi3/client/petstore/python-nextgen/requirements.txt
+++ b/samples/openapi3/client/petstore/python-nextgen/requirements.txt
@@ -1,5 +1,5 @@
 python_dateutil >= 2.5.3
 setuptools >= 21.0.0
 urllib3 >= 1.25.3
-pydantic >= 1.10.2
+pydantic >= 1.10.5, < 2
 aenum >= 3.1.11
diff --git a/samples/openapi3/client/petstore/python-nextgen/setup.py b/samples/openapi3/client/petstore/python-nextgen/setup.py
index e1bff332d2..10a9635393 100755
--- a/samples/openapi3/client/petstore/python-nextgen/setup.py
+++ b/samples/openapi3/client/petstore/python-nextgen/setup.py
@@ -28,7 +28,7 @@ REQUIRES = [
     "python-dateutil",
     "pem>=19.3.0",
     "pycryptodome>=3.9.0",
-    "pydantic",
+    "pydantic >= 1.10.5, < 2",
     "aenum"
 ]