diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..357d366
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+pastebin
diff --git a/config.go b/config.go
index 2cb4796..c949bfb 100644
--- a/config.go
+++ b/config.go
@@ -1,7 +1,11 @@
 package main
 
+import (
+	"time"
+)
+
 // Config ...
 type Config struct {
-	expiry int
+	expiry time.Duration
 	fqdn   string
 }
diff --git a/main.go b/main.go
index bc2a6a5..6e46eee 100644
--- a/main.go
+++ b/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"log"
+	"time"
 
 	"github.com/boltdb/bolt"
 	"github.com/namsral/flag"
@@ -18,16 +19,20 @@ func main() {
 		dbpath string
 		bind   string
 		fqdn   string
-		expiry int
+		expiry time.Duration
 	)
 
 	flag.StringVar(&config, "config", "", "config file")
 	flag.StringVar(&dbpath, "dbpth", "urls.db", "Database path")
 	flag.StringVar(&bind, "bind", "0.0.0.0:8000", "[int]:<port> to bind to")
 	flag.StringVar(&fqdn, "fqdn", "localhost", "FQDN for public access")
-	flag.IntVar(&expiry, "expiery", 5, "expiry time (mins) for passte")
+	flag.DurationVar(&expiry, "expiry", 5*time.Minute, "expiry time for pastes")
 	flag.Parse()
 
+	if expiry.Seconds() < 60 {
+		log.Fatalf("expiry of %s is too small", expiry)
+	}
+
 	// TODO: Abstract the Config and Handlers better
 	cfg.fqdn = fqdn
 	cfg.expiry = expiry
diff --git a/server.go b/server.go
index e9414ba..cc5b522 100644
--- a/server.go
+++ b/server.go
@@ -5,7 +5,6 @@ import (
 	"log"
 	"net/http"
 	"net/url"
-	"time"
 
 	"github.com/GeertJohan/go.rice"
 	"github.com/julienschmidt/httprouter"
@@ -94,7 +93,7 @@ func NewServer(bind string, config Config) *Server {
 		bind:      bind,
 		config:    config,
 		router:    httprouter.New(),
-		store:     cache.New(5*time.Minute, 10*time.Minute),
+		store:     cache.New(cfg.expiry, cfg.expiry*2),
 		templates: templice.New(rice.MustFindBox("templates")),
 	}