diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 369dcf8a..e75502b2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -19,7 +19,7 @@ build:
     - mkdir build
     - cd build
     - cmake -DCMAKE_BUILD_TYPE=Release ..
-    - make -j4
+    - make -j$(nproc)
   artifacts:
     untracked: true
     paths:
diff --git a/README.md b/README.md
index 3c5113fc..63b22746 100644
--- a/README.md
+++ b/README.md
@@ -27,10 +27,18 @@ cd $HOME/src
 git clone https://gitlab.com/PBSA/peerplays.git
 cd peerplays
 git submodule update --init --recursive
+
 # If you want to build Mainnet node
 cmake -DCMAKE_BUILD_TYPE=Release
+
 # If you want to build Testnet node
 cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_PEERPLAYS_TESTNET=1
+
+# Update -j flag depending on your current system specs;
+# Recommended 4GB of RAM per 1 CPU core
+# make -j2 for 8GB RAM
+# make -j4 for 16GB RAM
+# make -j8 for 32GB RAM
 make -j$(nproc)
 
 make install # this can install the executable files under /usr/local