diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 99fec003316702ea1236bf6a2ff51f5394fcfe7b..094c0811d74d810431ad65a02188ced10dda952f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,6 +11,8 @@ job:
         - apt-get install -y -V libboost-all-dev
         - apt-get install -y -V build-essential
         - apt-get install -y -V g++-8
+        - git clone https://github.com/ArashPartow/exprtk.git
+        - cp exprtk/exprt.hpp /usr/include
         - ./build.sh
 
     script: "./run_tests.sh"