diff --git a/Sources/SemanticVersion/SemanticVersion+Codable.swift b/Sources/SemanticVersion/SemanticVersion+Codable.swift
index 6d7d23c..8b106ae 100644
--- a/Sources/SemanticVersion/SemanticVersion+Codable.swift
+++ b/Sources/SemanticVersion/SemanticVersion+Codable.swift
@@ -38,7 +38,7 @@ extension JSONDecoder {
     }
 }
 
-private extension [CodingUserInfoKey: Any] {
+private extension Dictionary where Key == CodingUserInfoKey, Value == Any {
     var semanticDecodingStrategy: SemanticVersionStrategy {
         get {
             (self[.semanticVersionStrategy] as? SemanticVersionStrategy) ?? .defaultCodable