diff --git a/scripts/ci-hol4.sh b/scripts/ci-hol4.sh
index 5923115aad3ecfbdc033679643f8362699b2b6bd..7853eb1068bc93a69842ba9e8271250d80af564c 100755
--- a/scripts/ci-hol4.sh
+++ b/scripts/ci-hol4.sh
@@ -38,7 +38,7 @@ FLOVERDIR="$(pwd)"
 
 cd ./hol4
 
-Holmake
+Holmake -j1
 
 #cd ./binary