diff --git a/sources/png/common.swift b/sources/png/common.swift
index b86fc1f8..19fe0d21 100644
--- a/sources/png/common.swift
+++ b/sources/png/common.swift
@@ -43,6 +43,9 @@ extension General
         }
     }
 }
+extension General.Storage:Sendable where I:Sendable
+{
+}
 
 extension General 
 {    
diff --git a/sources/png/targets.swift b/sources/png/targets.swift
index a8de23fc..fd143164 100644
--- a/sources/png/targets.swift
+++ b/sources/png/targets.swift
@@ -344,6 +344,12 @@ extension PNG
         var a:T
     }
 }
+extension PNG.RGBA:Sendable where T:Sendable 
+{
+}
+extension PNG.VA:Sendable where T:Sendable 
+{
+}
 extension PNG.RGBA 
 {
     /// init PNG.RGBA.init(_:)