diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8ad53ebb..6a8c6c01 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -21,18 +21,18 @@ jobs:
           
       - run:
           name: Make project and user dir
-          command: mkdir -p /root/CFDEM/CFDEMcoupling && mkdir -p /root/CFDEM/-4.1
+          command: mkdir -p /root/CFDEM/CFDEMcoupling && mkdir -p /root/CFDEM/-6
 
       - checkout:
           path: /root/CFDEM/CFDEMcoupling
 
       - run:
           name: Add OpenFOAM package repository
-          command: sudo apt-get install -y software-properties-common wget apt-transport-https && sudo add-apt-repository http://dl.openfoam.org/ubuntu && sudo sh -c "wget -O - http://dl.openfoam.org/gpg.key | apt-key add -"
+          command: sudo apt-get install -y software-properties-common wget apt-transport-https && sudo sh -c "wget -O - http://dl.openfoam.org/gpg.key | apt-key add -" && sudo add-apt-repository http://dl.openfoam.org/ubuntu
 
       - run:
-          name: Install OpenFOAM 4.1
-          command: sudo apt-get update && sudo apt-get -y install openfoam4
+          name: Install OpenFOAM 6
+          command: sudo apt-get update && sudo apt-get -y install openfoam6
 
       - run:
           name: Clone LIGGGHTS repository
@@ -42,7 +42,7 @@ jobs:
           name: Build LIGGGHTS
           command: >
             shopt -s expand_aliases &&
-            source /opt/openfoam4/etc/bashrc &&
+            source /opt/openfoam6/etc/bashrc &&
             source /root/CFDEM/CFDEMcoupling/etc/bashrc &&
             bash /root/CFDEM/CFDEMcoupling/etc/compileLIGGGHTS.sh
           no_output_timeout: 30m
@@ -51,7 +51,7 @@ jobs:
           name: Build CFDEMcoupling library
           command: >
             shopt -s expand_aliases &&
-            source /opt/openfoam4/etc/bashrc &&
+            source /opt/openfoam6/etc/bashrc &&
             source /root/CFDEM/CFDEMcoupling/etc/bashrc &&
             bash /root/CFDEM/CFDEMcoupling/etc/compileCFDEMcoupling_src.sh
           
@@ -59,7 +59,7 @@ jobs:
           name: Build CFDEMcoupling solvers
           command: >
             shopt -s expand_aliases &&
-            source /opt/openfoam4/etc/bashrc &&
+            source /opt/openfoam6/etc/bashrc &&
             source /root/CFDEM/CFDEMcoupling/etc/bashrc &&
             bash /root/CFDEM/CFDEMcoupling/etc/compileCFDEMcoupling_sol.sh
 
@@ -67,6 +67,6 @@ jobs:
           name: Build CFDEMcoupling utilities
           command: >
             shopt -s expand_aliases &&
-            source /opt/openfoam4/etc/bashrc &&
+            source /opt/openfoam6/etc/bashrc &&
             source /root/CFDEM/CFDEMcoupling/etc/bashrc &&
             bash /root/CFDEM/CFDEMcoupling/etc/compileCFDEMcoupling_uti.sh