diff --git a/http/http.go b/http/http.go
index 8e9b96d..7ae0340 100644
--- a/http/http.go
+++ b/http/http.go
@@ -10,10 +10,8 @@ import (
 	"github.com/mpolden/ipd/useragent"
 	"github.com/sirupsen/logrus"
 
-	"math/big"
 	"net"
 	"net/http"
-	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -38,12 +36,12 @@ type Server struct {
 }
 
 type Response struct {
-	IP         net.IP   `json:"ip"`
-	IPDecimal  *big.Int `json:"ip_decimal"`
-	Country    string   `json:"country,omitempty"`
-	CountryISO string   `json:"country_iso,omitempty"`
-	City       string   `json:"city,omitempty"`
-	Hostname   string   `json:"hostname,omitempty"`
+	IP         net.IP `json:"ip"`
+	IPDecimal  uint64 `json:"ip_decimal"`
+	Country    string `json:"country,omitempty"`
+	CountryISO string `json:"country_iso,omitempty"`
+	City       string `json:"city,omitempty"`
+	Hostname   string `json:"hostname,omitempty"`
 }
 
 type PortResponse struct {
@@ -194,7 +192,7 @@ func (s *Server) DefaultHandler(w http.ResponseWriter, r *http.Request) *appErro
 	if err != nil {
 		return internalServerError(err)
 	}
-	t, err := template.New(filepath.Base(s.Template)).ParseFiles(s.Template)
+	t, err := template.ParseFiles(s.Template)
 	if err != nil {
 		return internalServerError(err)
 	}
diff --git a/iputil/iputil.go b/iputil/iputil.go
index ba5afa5..76e8500 100644
--- a/iputil/iputil.go
+++ b/iputil/iputil.go
@@ -26,12 +26,12 @@ func LookupPort(ip net.IP, port uint64) error {
 	return nil
 }
 
-func ToDecimal(ip net.IP) *big.Int {
+func ToDecimal(ip net.IP) uint64 {
 	i := big.NewInt(0)
 	if to4 := ip.To4(); to4 != nil {
 		i.SetBytes(to4)
 	} else {
 		i.SetBytes(ip)
 	}
-	return i
+	return i.Uint64()
 }
diff --git a/iputil/iputil_test.go b/iputil/iputil_test.go
index 2a04e10..abe8c94 100644
--- a/iputil/iputil_test.go
+++ b/iputil/iputil_test.go
@@ -1,7 +1,6 @@
 package iputil
 
 import (
-	"math/big"
 	"net"
 	"testing"
 )
@@ -9,14 +8,14 @@ import (
 func TestToDecimal(t *testing.T) {
 	var tests = []struct {
 		in  string
-		out *big.Int
+		out uint64
 	}{
-		{"127.0.0.1", big.NewInt(2130706433)},
-		{"::1", big.NewInt(1)},
+		{"127.0.0.1", 2130706433},
+		{"::1", 1},
 	}
 	for _, tt := range tests {
 		i := ToDecimal(net.ParseIP(tt.in))
-		if i.Cmp(tt.out) != 0 {
+		if tt.out != i {
 			t.Errorf("Expected %d, got %d for IP %s", tt.out, i, tt.in)
 		}
 	}