diff --git a/.github/workflows/test_examples.yml b/.github/workflows/test_examples.yml
index f1edf5776..67d49fd4c 100644
--- a/.github/workflows/test_examples.yml
+++ b/.github/workflows/test_examples.yml
@@ -21,10 +21,9 @@ jobs:
       - name: Preinstall
         run: |
           sudo apt-get update
-          sudo apt-get install libmuparser-dev python3 python3-dev python3-numpy python3-setuptools python-setuptools libhdf5-serial-dev libomp5 libomp-dev libfftw3-dev libcfitsio-dev lcov
+          sudo apt-get install libmuparser-dev python3 python3-dev python3-setuptools python-setuptools libhdf5-serial-dev libomp5 libomp-dev libfftw3-dev libcfitsio-dev lcov
           pip3 install -r doc/pages/example_notebooks/requirements.txt # load requrements for notebooks
           pip3 install --upgrade Pygments
-          pip3 install --upgrade numpy
       - name: Set up the build
         env:
           CXX: ${{ matrix.config.cxx }}
diff --git a/doc/pages/example_notebooks/requirements.txt b/doc/pages/example_notebooks/requirements.txt
index de0d4c0fd..9c7facc62 100644
--- a/doc/pages/example_notebooks/requirements.txt
+++ b/doc/pages/example_notebooks/requirements.txt
@@ -1,5 +1,5 @@
 # collection of all packages used in the analyis of the example notebooks. This is used for the automatic test of the notebooks
-numpy
+numpy==1.26.4 
 matplotlib
 pandas
 healpy
diff --git a/src/magneticField/turbulentField/PlaneWaveTurbulence.cpp b/src/magneticField/turbulentField/PlaneWaveTurbulence.cpp
index 1622e4067..47d2e46aa 100644
--- a/src/magneticField/turbulentField/PlaneWaveTurbulence.cpp
+++ b/src/magneticField/turbulentField/PlaneWaveTurbulence.cpp
@@ -59,6 +59,7 @@
 
 #ifdef ENABLE_FAST_WAVES
 #include <immintrin.h>
+#include <memory.h>
 #endif
 
 namespace crpropa {