diff --git a/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift b/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
index d64a418f..0d8dfb31 100644
--- a/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
+++ b/Sources/OpenAPIRuntime/Interface/CurrencyTypes.swift
@@ -71,8 +71,8 @@ extension ServerRequestMetadata: CustomStringConvertible {
 
 extension HTTPFields: PrettyStringConvertible {
     var prettyDescription: String {
-        sorted(by: { $0.name.canonicalName.localizedCompare($1.name.canonicalName) == .orderedAscending })
-            .map { "\($0.name.canonicalName): \($0.value)" }.joined(separator: "; ")
+        sorted(by: { $0.name.canonicalName < $1.name.canonicalName }).map { "\($0.name.canonicalName): \($0.value)" }
+            .joined(separator: "; ")
     }
 }
 
diff --git a/Sources/OpenAPIRuntime/URICoder/Serialization/URISerializer.swift b/Sources/OpenAPIRuntime/URICoder/Serialization/URISerializer.swift
index 838ca9b1..aa606381 100644
--- a/Sources/OpenAPIRuntime/URICoder/Serialization/URISerializer.swift
+++ b/Sources/OpenAPIRuntime/URICoder/Serialization/URISerializer.swift
@@ -249,9 +249,7 @@ extension URISerializer {
         forKey key: String
     ) throws {
         guard !dictionary.isEmpty else { return }
-        let sortedDictionary = dictionary.sorted { a, b in
-            a.key.localizedCaseInsensitiveCompare(b.key) == .orderedAscending
-        }
+        let sortedDictionary = dictionary.sorted { a, b in a.key.lowercased() < b.key.lowercased() }
 
         let keyAndValueSeparator: String
         let pairSeparator: String