diff --git a/cmd/decypharr/main.go b/cmd/decypharr/main.go
index 384ffae..1c04214 100644
--- a/cmd/decypharr/main.go
+++ b/cmd/decypharr/main.go
@@ -16,7 +16,6 @@ import (
 	"runtime/debug"
 	"strconv"
 	"sync"
-	"syscall"
 )
 
 func Start(ctx context.Context) error {
@@ -26,8 +25,7 @@ func Start(ctx context.Context) error {
 		if err != nil {
 			return fmt.Errorf("invalid UMASK value: %s", umaskStr)
 		}
-		// Set umask
-		syscall.Umask(int(umask))
+		SetUmask(int(umask))
 	}
 
 	cfg := config.GetConfig()
diff --git a/cmd/decypharr/umask_unix.go b/cmd/decypharr/umask_unix.go
new file mode 100644
index 0000000..23636b4
--- /dev/null
+++ b/cmd/decypharr/umask_unix.go
@@ -0,0 +1,9 @@
+//go:build !windows
+
+package decypharr
+
+import "syscall"
+
+func SetUmask(umask int) {
+	syscall.Umask(umask)
+}
diff --git a/cmd/decypharr/umask_win.go b/cmd/decypharr/umask_win.go
new file mode 100644
index 0000000..06299cc
--- /dev/null
+++ b/cmd/decypharr/umask_win.go
@@ -0,0 +1,8 @@
+//go:build windows
+// +build windows
+
+package decypharr
+
+func SetUmask(umask int) {
+	// No-op on Windows
+}