diff --git a/pyproject.toml b/pyproject.toml
index 754779410..c877e512e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ requires = [
     "setuptools>=45",
     "setuptools_scm[toml]>=6.0",
     "cmake-build-extension>=0.4",
-    "cppyy==3.1.2",
+    "cppyy==3.5.0",
 ]
 
 [tool.setuptools_scm]
diff --git a/setup.cfg b/setup.cfg
index 9f9be6f84..6274de69e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,5 +38,5 @@ classifiers =
 zip_safe = False
 python_requires = >=3.8
 install_requires =
-    cppyy==3.1.2
+    cppyy==3.5.0
 
diff --git a/utils/tests/gitlab-ci-cppyy.yml b/utils/tests/gitlab-ci-cppyy.yml
index bf26e87e6..68f00837e 100644
--- a/utils/tests/gitlab-ci-cppyy.yml
+++ b/utils/tests/gitlab-ci-cppyy.yml
@@ -11,7 +11,7 @@ cppyy-22.04:
       python3 python3-pip
       libboost-dev libgsl-dev libgtk-3-dev
       git wget
-    - pip install cppyy==3.1.2 matplotlib numpy
+    - pip install cppyy==3.5.0 matplotlib numpy
   script:
     - if (git remote | grep -qw upstream) ; then
       git remote remove upstream ;