diff --git a/ci/build.sh b/ci/build.sh
index 6d71bfd..bd253e0 100755
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -16,7 +16,7 @@ esac
 
 ./autogen.sh &&
     ./configure "${configure_options[@]}" &&
-    make &&
+    make -j$(nproc) &&
     case "$(uname)" in
 	MSYS*|MINGW*)
 	    ;;