diff --git a/Sources/Gzip/Data+Gzip.swift b/Sources/Gzip/Data+Gzip.swift
index b636378..0c277a9 100644
--- a/Sources/Gzip/Data+Gzip.swift
+++ b/Sources/Gzip/Data+Gzip.swift
@@ -42,7 +42,7 @@ public enum Gzip {
 
 
 /// Compression level whose rawValue is based on the zlib's constants.
-public struct CompressionLevel: RawRepresentable {
+public struct CompressionLevel: RawRepresentable, Sendable {
     
     /// Compression level in the range of `0` (no compression) to `9` (maximum compression).
     public let rawValue: Int32