diff --git a/doc/changelog.d/1464.dependencies.md b/doc/changelog.d/1464.dependencies.md
new file mode 100644
index 0000000000..1d09334c5a
--- /dev/null
+++ b/doc/changelog.d/1464.dependencies.md
@@ -0,0 +1 @@
+update protobuf from 5.27.2 to 5.27.5
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 9cde63af02..a4bdf0a3d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,7 +56,7 @@ tests = [
     "grpcio-health-checking==1.66.2",
     "numpy==2.1.2",
     "Pint==0.24.3",
-    "protobuf==5.27.2",
+    "protobuf==5.27.5",
     "pytest==8.3.3",
     "pytest-cov==5.0.0",
     "pytest-pyvista==0.1.9",
@@ -93,7 +93,7 @@ doc = [
     "numpy==2.1.2",
     "panel==1.5.2",
     "Pint==0.24.3",
-    "protobuf==5.27.2",
+    "protobuf==5.27.5",
     "pyvista[jupyter]==0.44.1",
     "requests==2.32.3",
     "scipy==1.14.1",