diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2b771b5dd2c..6d6a0666e84 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -107,7 +107,7 @@ ubuntu-20.04-sanitizer:
   image: docker.pkg.github.com/espressomd/docker/ubuntu-20.04:a1192b35590a1a474c55fe1e9a1e6c25758454ea
   stage: build
   script:
-    - export myconfig=maxset with_cuda=false with_coverage=false with_static_analysis=true with_asan=true with_ubsan=true test_timeout=900 ASAN_OPTIONS="allocator_may_return_null=1" OMPI_CC=clang-9 OMPI_CXX=clang++-9 CC=clang-9 CXX=clang++-9
+    - export myconfig=maxset with_cuda=false with_coverage=false with_static_analysis=true with_asan=true with_ubsan=true test_timeout=900 ASAN_OPTIONS="allocator_may_return_null=1" OMPI_CC=clang-9 OMPI_CXX=clang++-9 CC=clang-9 CXX=clang++-9 UBSAN_OPTIONS=suppressions=${CI_PROJECT_DIR}/maintainer/CI/ubsan.supp
     - bash maintainer/CI/build_cmake.sh
   tags:
     - docker
diff --git a/maintainer/CI/ubsan.supp b/maintainer/CI/ubsan.supp
new file mode 100644
index 00000000000..8b97055ac07
--- /dev/null
+++ b/maintainer/CI/ubsan.supp
@@ -0,0 +1,10 @@
+# Stuff occuring in boost directly
+null:boost/serialization/singleton.hpp
+null:boost/mpi/detail/binary_buffer_iprimitive.hpp
+null:boost/mpi/communicator.hpp
+
+# Caused by boost MPI
+null:stl_iterator.h
+
+# function calls with invalid pointers in Cython-generated code
+function:python/espressomd/*.cpp