diff --git a/Package.resolved b/Package.resolved
index 7b36155..60cf8b8 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -1,13 +1,13 @@
 {
-  "originHash" : "0cd8515406137deb69d604344cc3fc16f80b2518f4dd27a5eeda64f7673d3cbd",
+  "originHash" : "4a541144be2c0eeb933e247eb979bdd12bfc3b3d61a512ccb733fcf9df22079d",
   "pins" : [
     {
       "identity" : "shellkit",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/Cocoanetics/ShellKit",
       "state" : {
-        "branch" : "main",
-        "revision" : "ce2147463e7f08732112bb8929cd79944942f9d9"
+        "revision" : "40c1b417e6c6318d2ca644d9a3062dc6befd0e31",
+        "version" : "0.1.0"
       }
     },
     {
diff --git a/Package.swift b/Package.swift
index d081636..a8d94ad 100644
--- a/Package.swift
+++ b/Package.swift
@@ -31,8 +31,14 @@ let package = Package(
         // virtualised Shell). The standalone `swift-script` CLI uses
         // `Shell.processDefault` so the binary still talks to real
         // FileHandles when run on its own.
+        //
+        // Versioned (not `branch: "main"`) so SwiftScript itself can be
+        // required by version: SwiftPM refuses a version requirement on a
+        // package whose own dependencies are branch-pinned. `upToNextMinor`
+        // because ShellKit is 0.x and a minor bump may change API; the
+        // family moves minors together (Cocoanetics/SwiftBash#89).
         .package(url: "https://github.com/Cocoanetics/ShellKit",
-                 branch: "main"),
+                 .upToNextMinor(from: "0.1.0")),
     ],
     targets: [
         .target(