diff --git a/.swift-version b/.swift-version
new file mode 100644
index 0000000..d0b9234
--- /dev/null
+++ b/.swift-version
@@ -0,0 +1 @@
+DEVELOPMENT-SNAPSHOT-2016-05-09-a
diff --git a/SlackKit/Sources/NetworkInterface.swift b/SlackKit/Sources/NetworkInterface.swift
index fe743e0..a6cd9ff 100644
--- a/SlackKit/Sources/NetworkInterface.swift
+++ b/SlackKit/Sources/NetworkInterface.swift
@@ -125,7 +125,11 @@ internal struct NetworkInterface {
     }
     
     private func randomBoundary() -> String {
-        return "slackkit.boundary.\(arc4random())\(arc4random())"
+        #if os(Linux)
+            return "slackkit.boundary.\(Int(random()))\(Int(random()))"
+        #else
+            return "slackkit.boundary.\(arc4random())\(arc4random())"
+        #endif
     }
     
     private func requestStringFromParameters(parameters: [String: Any]) -> String {