diff --git a/esmerald/openapi/models.py b/esmerald/openapi/models.py
index a3db65c6..1cb1e276 100644
--- a/esmerald/openapi/models.py
+++ b/esmerald/openapi/models.py
@@ -38,7 +38,7 @@
 
 class APIKey(SecurityScheme):
     type: Literal["apiKey", "http", "mutualTLS", "oauth2", "openIdConnect"] = Field(
-        default=SecuritySchemeType.apiKey,
+        default=SecuritySchemeType.apiKey.value,
         alias="type",
     )
     param_in: APIKeyIn = Field(alias="in")
@@ -47,7 +47,7 @@ class APIKey(SecurityScheme):
 
 class HTTPBase(SecurityScheme):
     type: Literal["apiKey", "http", "mutualTLS", "oauth2", "openIdConnect"] = Field(
-        default=SecuritySchemeType.http,
+        default=SecuritySchemeType.http.value,
         alias="type",
     )
     scheme: str
@@ -64,14 +64,14 @@ class OAuthFlow(OpenOAuthFlow):
 
 class OAuth2(SecurityScheme):
     type: Literal["apiKey", "http", "mutualTLS", "oauth2", "openIdConnect"] = Field(
-        default=SecuritySchemeType.oauth2, alias="type"
+        default=SecuritySchemeType.oauth2.value, alias="type"
     )
     flows: OAuthFlows
 
 
 class OpenIdConnect(SecurityScheme):
     type: Literal["apiKey", "http", "mutualTLS", "oauth2", "openIdConnect"] = Field(
-        default=SecuritySchemeType.openIdConnect, alias="type"
+        default=SecuritySchemeType.openIdConnect.value, alias="type"
     )
     openIdConnectUrl: str
 
diff --git a/tests/routing/test_syntax_enum.py b/tests/routing/test_syntax_enum.py
index c02da972..76d5a984 100644
--- a/tests/routing/test_syntax_enum.py
+++ b/tests/routing/test_syntax_enum.py
@@ -5,7 +5,7 @@
 from esmerald import Gateway, JSONResponse, get
 from esmerald.testclient import create_client
 
-pydantic_version = __version__[:3]
+pydantic_version = ".".join(__version__.split(".")[:2])
 
 
 class ItemType(str, Enum):