diff --git a/.github/workflows/ci_cd.yml b/.github/workflows/ci_cd.yml
index 5760bfa17a..9ab7afff8f 100644
--- a/.github/workflows/ci_cd.yml
+++ b/.github/workflows/ci_cd.yml
@@ -9,7 +9,7 @@ on:
       - main
 
 env:
-  MAIN_PYTHON_VERSION: '3.13'
+  MAIN_PYTHON_VERSION: '3.12'
   PACKAGE_NAME: 'ansys-geometry-core'
   DOCUMENTATION_CNAME: 'geometry.docs.pyansys.com'
   ANSRV_GEO_IMAGE: 'ghcr.io/ansys/geometry'
diff --git a/.github/workflows/nightly_docker_test.yml b/.github/workflows/nightly_docker_test.yml
index e57ae775f4..2aca50bdc1 100644
--- a/.github/workflows/nightly_docker_test.yml
+++ b/.github/workflows/nightly_docker_test.yml
@@ -21,7 +21,7 @@ on:
       - v*
 
 env:
-  MAIN_PYTHON_VERSION: '3.13'
+  MAIN_PYTHON_VERSION: '3.12'
   ANSRV_GEO_IMAGE_WINDOWS_TAG: ghcr.io/ansys/geometry:windows-latest-unstable
   ANSRV_GEO_IMAGE_WINDOWS_CORE_TAG: ghcr.io/ansys/geometry:core-windows-latest-unstable
   ANSRV_GEO_IMAGE_LINUX_CORE_TAG: ghcr.io/ansys/geometry:core-linux-latest-unstable
diff --git a/doc/changelog.d/1584.fixed.md b/doc/changelog.d/1584.fixed.md
new file mode 100644
index 0000000000..ee772e6165
--- /dev/null
+++ b/doc/changelog.d/1584.fixed.md
@@ -0,0 +1 @@
+vtk/pyvista issues
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index ba753e1c8e..d51b6d9f52 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,12 +62,12 @@ tests = [
     "pytest-cov==6.0.0",
     "pytest-pyvista==0.1.9",
     "pytest-xvfb==3.0.0",
-    "pyvista[jupyter]==0.44.1",
+    "pyvista[jupyter]==0.44.2",
     "requests==2.32.3",
     "scipy==1.14.1",
     "semver==3.0.2",
     "six==1.17.0",
-    "vtk==9.4.0",
+    "vtk==9.3.1",
 ]
 tests-minimal = [
     "pytest==8.3.4",
@@ -95,7 +95,7 @@ doc = [
     "panel==1.5.4",
     "Pint==0.24.4",
     "protobuf==5.28.3",
-    "pyvista[jupyter]==0.44.1",
+    "pyvista[jupyter]==0.44.2",
     "requests==2.32.3",
     "scipy==1.14.1",
     "semver==3.0.2",
@@ -105,7 +105,7 @@ doc = [
     "sphinx-copybutton==0.5.2",
     "sphinx-jinja==2.0.2",
     "trame-vtk==2.8.12",
-    "vtk==9.4.0",
+    "vtk==9.3.1",
 ]
 
 [project.urls]