diff --git a/README.md b/README.md
index 0381d7ad..101bd55f 100644
--- a/README.md
+++ b/README.md
@@ -44,8 +44,13 @@ The following table maps package releases to their minimum required Swift toolch
 | swift-subprocess 0.2.x | >= Swift 6.1  | >= Xcode 16.3 |
 | swift-subprocess 0.3.x | >= Swift 6.1  | >= Xcode 16.3 |
 | swift-subprocess 0.4.x | >= Swift 6.1  | >= Xcode 16.3 |
+| swift-subprocess 0.5.x | >= Swift 6.2  | >= Xcode 26   |
+| swift-subprocess 1.0.x | >= Swift 6.2  | >= Xcode 26   |
 | main                   | >= Swift 6.2  | >= Xcode 26   |
 
+> [!NOTE]
+> On Darwin, the Xcode column states an SDK requirement as well as a toolchain requirement. Foundation and the other SDK modules come from the active Xcode, so a toolchain installed from swift.org still needs the listed Xcode selected through `xcode-select` or `DEVELOPER_DIR`.
+
 
 ## Feature Overview