diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6492961..8ef29d7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,7 +31,7 @@ make_test:
     - docker-ci
   script:
     - apt-get update
-    - apt-get install -y g++ make cmake clang-tidy
+    - apt-get install -y clang make cmake clang-tidy
     - mkdir current
     - ls | grep -v current | xargs mv -t current
     - git clone https://github.com/catchorg/Catch2.git
@@ -57,7 +57,7 @@ cmake_build:
     - docker-ci
   script:
     - apt-get update
-    - apt-get install -y g++ make cmake clang-tidy
+    - apt-get install -y clang make cmake clang-tidy
     - mkdir current
     - ls | grep -v current | xargs mv -t current
     - git clone https://github.com/catchorg/Catch2.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1c23b1..adc7ebb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,9 @@ if ("${CMAKE_BINARY_DIR}" STREQUAL "${CMAKE_SOURCE_DIR}")
 endif()
 set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES "bin" "doc" "CMakeFiles" "lib" "include")
 
+set(CMAKE_C_COMPILER "clang")
+set(CMAKE_CXX_COMPILER "clang++")
+
 project(Simple_Draw)
 set(CMAKE_CXX_STANDARD 14)