diff --git a/pyproject.toml b/pyproject.toml
index 013a1aba0..2d3ba28d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ dev = [
     "psutil==5.9.2",
     "stix2==3.0.1",
     "requests==2.31.0",
-    "mypy-protobuf==3.5.0",
+    "mypy-protobuf==3.6.0",
     # type stubs for mypy
     "types-backports==0.1.3",
     "types-colorama==0.4.15.11",