diff --git a/option.go b/option.go
new file mode 100644
index 0000000..e86ae55
--- /dev/null
+++ b/option.go
@@ -0,0 +1,22 @@
+package udpproxy
+
+import (
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// Option is a functional option type that allows us to configure the Client.
+type Option func(*Client)
+
+// WithSessionTimeout is a functional option to set the session timeout
+func WithSessionTimeout(timeout time.Duration) Option {
+	return func(c *Client) {
+		if timeout < time.Minute {
+			log.Warnf("cannot set stale session timeout to less than 1 minute.. defaulting to 20 minutes")
+			return
+		}
+
+		c.sessionTimeout = timeout
+	}
+}
diff --git a/udpproxy.go b/udpproxy.go
index 5198d10..df43756 100644
--- a/udpproxy.go
+++ b/udpproxy.go
@@ -7,21 +7,6 @@ import (
 	log "github.com/sirupsen/logrus"
 )
 
-// Option is a functional option type that allows us to configure the Client.
-type Option func(*Client)
-
-// WithSessionTimeout is a functional option to set the session timeout
-func WithSessionTimeout(timeout time.Duration) Option {
-	return func(c *Client) {
-		if timeout < time.Minute {
-			log.Warnf("cannot set stale session timeout to less than 1 minute.. defaulting to 20 minutes")
-			return
-		}
-
-		c.sessionTimeout = timeout
-	}
-}
-
 type Client struct {
 	laddr *net.UDPAddr
 	raddr *net.UDPAddr