diff --git a/go.mod b/go.mod
index efd72d4..ded0e61 100644
--- a/go.mod
+++ b/go.mod
@@ -1,14 +1,18 @@
 module datesorter
 
-go 1.23.3
+go 1.23.6
 
-require git.site.quack-lab.dev/dave/cylogger v1.4.0
+require (
+	git.site.quack-lab.dev/dave/cylogger v1.4.0
+	git.site.quack-lab.dev/dave/cyutils v1.4.0
+)
 
 require (
 	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/hexops/valast v1.5.0 // indirect
 	golang.org/x/mod v0.7.0 // indirect
 	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/time v0.12.0 // indirect
 	golang.org/x/tools v0.4.0 // indirect
 	mvdan.cc/gofumpt v0.4.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 33bd5b7..c8737cf 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 git.site.quack-lab.dev/dave/cylogger v1.4.0 h1:3Ca7V5JWvruARJd5S8xDFwW9LnZ9QInqkYLRdrEFvuY=
 git.site.quack-lab.dev/dave/cylogger v1.4.0/go.mod h1:wctgZplMvroA4X6p8f4B/LaCKtiBcT1Pp+L14kcS8jk=
+git.site.quack-lab.dev/dave/cyutils v1.4.0 h1:/Xo3QfLIFNab+axHneWmUK4MyfuObl+qq8whF9vTQpk=
+git.site.quack-lab.dev/dave/cyutils v1.4.0/go.mod h1:fBjALu2Cp2u2bDr+E4zbGVMBeIgFzROg+4TCcTNAiQU=
 github.com/frankban/quicktest v1.14.3 h1:FJKSZTDHjyhriyC81FLQ0LY93eSai0ZyR/ZIkd3ZUKE=
 github.com/frankban/quicktest v1.14.3/go.mod h1:mgiwOwqx65TmIk1wJ6Q7wvnVMocbUorkibMOrVTHZps=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
@@ -22,6 +24,8 @@ golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
 golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
+golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
 golang.org/x/tools v0.4.0 h1:7mTAgkunk3fr4GAloyyCasadO6h9zSsQZbwvcaIciV4=
 golang.org/x/tools v0.4.0/go.mod h1:UE5sM2OK9E/d67R0ANs2xJizIymRP5gJU295PvKXxjQ=
 mvdan.cc/gofumpt v0.4.0 h1:JVf4NN1mIpHogBj7ABpgOyZc65/UUOkKQFkoURsz4MM=
diff --git a/main.go b/main.go
index 89bb131..6c75331 100644
--- a/main.go
+++ b/main.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	logger "git.site.quack-lab.dev/dave/cylogger"
+	"git.site.quack-lab.dev/dave/cyutils"
 )
 
 type DateParser interface {
@@ -55,13 +56,15 @@ func main() {
 
 	files := flag.Args()
 
-	for _, file := range files {
-		filelog := logger.Default.WithPrefix(fmt.Sprintf("file=%q", file))
+
+	cyutils.WithWorkers(10, files, func(worker int, _ int, file string) {
+		workerlog := logger.Default.WithPrefix(fmt.Sprintf("worker=%d", worker))
+		filelog := workerlog.WithPrefix(fmt.Sprintf("file=%q", file))
 		filelog.Info("processing file")
 		date, err := parseDate(file, parsers)
 		if err != nil {
 			filelog.Error("error parsing date: %s", err)
-			continue
+			return
 		}
 		filelog.Info("date: %s", date)
 		
@@ -71,26 +74,26 @@ func main() {
 		err = os.MkdirAll(datedir, 0755)
 		if err != nil {
 			filelog.Error("error creating directory: %s", err)
-			continue
+			return
 		}
 		// Make sure file doesn't exist
 		destfile, err := os.Stat(dest)
 		if err == nil {
 			filelog.Info("dest file already exists: %s", destfile.Name())
-			continue
+			return
 		} else {
 			if !os.IsNotExist(err) {
 				filelog.Error("error checking dest file: %s", err)
-				continue
+				return
 			}
 		}
 		err = os.Rename(file, dest)
 		if err != nil {
 			filelog.Error("error renaming file: %s", err)
-			continue
+			return
 		}
 		filelog.Info("moved to %q", dest)
-	}
+	})
 }
 
 func parseDate(file string, parsers []DateParser) (time.Time, error) {