diff --git a/.gitlab/pipeline/centos.yml b/.gitlab/pipeline/centos.yml
index 93b451bc..f0447bbd 100644
--- a/.gitlab/pipeline/centos.yml
+++ b/.gitlab/pipeline/centos.yml
@@ -14,7 +14,7 @@ centos8_clang:
     - ctest -VV
   parallel:
     matrix:
-      - CGAL_VERSION: ["5.3", "5.4"]
+      - CGAL_VERSION: ["5.6"]
 
 centos8_gcc:
   stage: test
@@ -32,4 +32,4 @@ centos8_gcc:
     - ctest -VV
   parallel:
     matrix:
-      - CGAL_VERSION: ["5.3", "5.4"]
+      - CGAL_VERSION: ["5.6"]
diff --git a/.gitlab/pipeline/debian.yml b/.gitlab/pipeline/debian.yml
index 23e374a8..050abf1c 100644
--- a/.gitlab/pipeline/debian.yml
+++ b/.gitlab/pipeline/debian.yml
@@ -12,7 +12,7 @@ debian_testing_gcc:
     - ctest -VV
   parallel:
     matrix:
-      - CGAL_VERSION: ["5.3", "5.4"]
+      - CGAL_VERSION: ["5.6"]
 
 debian_buster_gcc:
   stage: test
@@ -28,7 +28,7 @@ debian_buster_gcc:
     - ctest -VV
   parallel:
     matrix:
-      - CGAL_VERSION: ["5.3", "5.4"]
+      - CGAL_VERSION: ["5.6"]
 
 debian_testing_clang:
   stage: test
@@ -44,7 +44,7 @@ debian_testing_clang:
     - ctest -VV
   parallel:
     matrix:
-      - CGAL_VERSION: ["5.3", "5.4"]
+      - CGAL_VERSION: ["5.6"]
 
 debian_buster_clang:
   stage: test