diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0944eae2f5b68a49b59a80d6d80e1516d7113925..bd70efcfca3aea4ab861f211810a9a55079822ee 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -168,7 +168,7 @@ build:linux:gcc5.3.1:
     - cd build
     - make Cpplint-Test-Suite
     - make Cppcheck-Test-Suite
-    - make -j
+    - make -j8
   artifacts:
     paths:
     - build
@@ -186,7 +186,7 @@ build:linux:gcc6.3.1:
     - cd build
     - make Cpplint-Test-Suite
     - make Cppcheck-Test-Suite
-    - make -j
+    - make -j8
   artifacts:
     paths:
     - build