diff --git a/mobidict.spec b/mobidict.spec
index f8528fc..03eaacd 100644
--- a/mobidict.spec
+++ b/mobidict.spec
@@ -26,6 +26,8 @@ Url:            https://github.com/ismail/mobidict
 Source:         https://github.com/ismail/mobidict/releases/download/v%{version}/mobidict-%{version}.tar.xz
 Source1:        https://github.com/ismail/mobidict/releases/download/v%{version}/mobidict-%{version}.tar.xz.asc
 Source2:        %{name}.keyring
+BuildRequires:  cmake
+BuildRequires:  ninja
 BuildRequires:  pkgconfig(Qt5Concurrent)
 BuildRequires:  pkgconfig(Qt5Gui)
 BuildRequires:  pkgconfig(Qt5Svg)
@@ -44,6 +46,7 @@ patch -p1 < ../libmobi.patch
 patch -p1 < ../update-enc-length.patch
 
 %build
+%define __builder ninja
 %cmake
 
 %install