diff --git a/generator/templates/server/server.gotmpl b/generator/templates/server/server.gotmpl
index 1bd7a7eac6..c78d22051a 100644
--- a/generator/templates/server/server.gotmpl
+++ b/generator/templates/server/server.gotmpl
@@ -9,7 +9,10 @@ package {{ .APIPackage }}
 import (
 	"context"
 	"crypto/tls"
+	"crypto/x509"
 	"errors"
+	"fmt"
+	"io/ioutil"
 	"log"
 	"net"
 	"net/http"