diff --git a/Cargo.lock b/Cargo.lock
index 98f8f06..2fa3f85 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -232,9 +232,9 @@ dependencies = [
 
 [[package]]
 name = "constant-string"
-version = "0.0.5"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ce90aacfb6880505db3aed4b126006c685cf2df128c929edc2c25013f720612"
+checksum = "fca1829c3b093c20be8a8c35d5dba5a251ae2e2e7bac8398b9364eb8cf77cd47"
 dependencies = [
  "serde",
  "utoipa",
diff --git a/Cargo.toml b/Cargo.toml
index 0551e18..e3a2f3c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ version = "0.2.11"
 
 [workspace.dependencies]
 chrono = "0.4.42"
-constant-string = "0.0.5"
+constant-string = "1.0.1"
 email_address = { version = "0.2.9", default-features = false }
 fortifier = { path = "./packages/fortifier", version = "0.2.0" }
 fortifier-macros = { path = "./packages/fortifier-macros", version = "0.2.0" }
diff --git a/packages/fortifier/src/validations/email_address.rs b/packages/fortifier/src/validations/email_address.rs
index fc1f962..58a4325 100644
--- a/packages/fortifier/src/validations/email_address.rs
+++ b/packages/fortifier/src/validations/email_address.rs
@@ -34,6 +34,7 @@ pub enum EmailAddressError {
     InvalidCharacter {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -44,6 +45,7 @@ pub enum EmailAddressError {
     MissingSeparator {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -54,6 +56,7 @@ pub enum EmailAddressError {
     LocalPartEmpty {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -64,6 +67,7 @@ pub enum EmailAddressError {
     LocalPartTooLong {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -74,6 +78,7 @@ pub enum EmailAddressError {
     DomainEmpty {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -84,6 +89,7 @@ pub enum EmailAddressError {
     DomainTooLong {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -94,6 +100,7 @@ pub enum EmailAddressError {
     SubDomainEmpty {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -104,6 +111,7 @@ pub enum EmailAddressError {
     SubDomainTooLong {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -114,6 +122,7 @@ pub enum EmailAddressError {
     DomainTooFew {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -124,6 +133,7 @@ pub enum EmailAddressError {
     DomainInvalidSeparator {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -134,6 +144,7 @@ pub enum EmailAddressError {
     UnbalancedQuotes {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -144,6 +155,7 @@ pub enum EmailAddressError {
     InvalidComment {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -154,6 +166,7 @@ pub enum EmailAddressError {
     InvalidIPAddress {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -164,6 +177,7 @@ pub enum EmailAddressError {
     UnsupportedDomainLiteral {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -174,6 +188,7 @@ pub enum EmailAddressError {
     UnsupportedDisplayName {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -184,6 +199,7 @@ pub enum EmailAddressError {
     MissingDisplayName {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
@@ -194,6 +210,7 @@ pub enum EmailAddressError {
     MissingEndBracket {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: EmailAddressErrorCode,
 
         /// A human-readable error message.
diff --git a/packages/fortifier/src/validations/length.rs b/packages/fortifier/src/validations/length.rs
index 456b2f6..7823f22 100644
--- a/packages/fortifier/src/validations/length.rs
+++ b/packages/fortifier/src/validations/length.rs
@@ -37,6 +37,7 @@ pub enum LengthError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: LengthErrorCode,
 
         /// A human-readable error message.
@@ -53,6 +54,7 @@ pub enum LengthError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: LengthErrorCode,
 
         /// A human-readable error message.
@@ -69,6 +71,7 @@ pub enum LengthError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: LengthErrorCode,
 
         /// A human-readable error message.
diff --git a/packages/fortifier/src/validations/phone_number.rs b/packages/fortifier/src/validations/phone_number.rs
index 62835d8..b73f90c 100644
--- a/packages/fortifier/src/validations/phone_number.rs
+++ b/packages/fortifier/src/validations/phone_number.rs
@@ -30,6 +30,7 @@ pub enum PhoneNumberError {
     NoNumber {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -40,6 +41,7 @@ pub enum PhoneNumberError {
     InvalidCountryCode {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -50,6 +52,7 @@ pub enum PhoneNumberError {
     TooShortAfterIdd {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -60,6 +63,7 @@ pub enum PhoneNumberError {
     TooShortNsn {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -70,6 +74,7 @@ pub enum PhoneNumberError {
     TooLong {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -80,6 +85,7 @@ pub enum PhoneNumberError {
     MalformedInteger {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// A human-readable error message.
@@ -90,6 +96,7 @@ pub enum PhoneNumberError {
     DisallowedCountryCode {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: PhoneNumberErrorCode,
 
         /// Allowed country codes.
diff --git a/packages/fortifier/src/validations/range.rs b/packages/fortifier/src/validations/range.rs
index c1bebb7..4435ffb 100644
--- a/packages/fortifier/src/validations/range.rs
+++ b/packages/fortifier/src/validations/range.rs
@@ -33,6 +33,7 @@ pub enum RangeError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: RangeErrorCode,
 
         /// A human-readable error message.
@@ -49,6 +50,7 @@ pub enum RangeError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: RangeErrorCode,
 
         /// A human-readable error message.
@@ -65,6 +67,7 @@ pub enum RangeError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: RangeErrorCode,
 
         /// A human-readable error message.
@@ -81,6 +84,7 @@ pub enum RangeError<T> {
 
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: RangeErrorCode,
 
         /// A human-readable error message.
diff --git a/packages/fortifier/src/validations/regex.rs b/packages/fortifier/src/validations/regex.rs
index 7999438..bbf2fb7 100644
--- a/packages/fortifier/src/validations/regex.rs
+++ b/packages/fortifier/src/validations/regex.rs
@@ -50,6 +50,7 @@ constant_string!(RegexErrorCode, REGEX_ERROR_CODE, "regex");
 pub struct RegexError {
     /// The error code.
     #[cfg_attr(feature = "serde", serde(default))]
+    #[cfg_attr(feature = "utoipa", schema(inline))]
     code: RegexErrorCode,
 
     /// A human-readable error message.
diff --git a/packages/fortifier/src/validations/url.rs b/packages/fortifier/src/validations/url.rs
index 4a08eef..c8536d8 100644
--- a/packages/fortifier/src/validations/url.rs
+++ b/packages/fortifier/src/validations/url.rs
@@ -29,6 +29,7 @@ pub enum UrlError {
     EmptyHost {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -39,6 +40,7 @@ pub enum UrlError {
     IdnaError {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -49,6 +51,7 @@ pub enum UrlError {
     InvalidPort {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -59,6 +62,7 @@ pub enum UrlError {
     InvalidIpv4Address {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -69,6 +73,7 @@ pub enum UrlError {
     InvalidIpv6Address {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -79,6 +84,7 @@ pub enum UrlError {
     InvalidDomainCharacter {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -89,6 +95,7 @@ pub enum UrlError {
     RelativeUrlWithoutBase {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -99,6 +106,7 @@ pub enum UrlError {
     RelativeUrlWithCannotBeABaseBase {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -109,6 +117,7 @@ pub enum UrlError {
     SetHostOnCannotBeABaseUrl {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -119,6 +128,7 @@ pub enum UrlError {
     Overflow {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.
@@ -129,6 +139,7 @@ pub enum UrlError {
     Unknown {
         /// The error code.
         #[cfg_attr(feature = "serde", serde(default))]
+        #[cfg_attr(feature = "utoipa", schema(inline))]
         code: UrlErrorCode,
 
         /// A human-readable error message.