diff --git a/pylib/pyproject.toml b/pylib/pyproject.toml
index 23e10077f..fb7422694 100644
--- a/pylib/pyproject.toml
+++ b/pylib/pyproject.toml
@@ -7,7 +7,7 @@ dependencies = [
   "decorator",
   "markdown",
   "orjson",
-  "protobuf>=4.21",
+  "protobuf>=6.0,<8.0",
   "requests[socks]",
   # remove after we update to min python 3.11+
   "typing_extensions",
diff --git a/uv.lock b/uv.lock
index 5a1a7ded9..d4277425a 100644
--- a/uv.lock
+++ b/uv.lock
@@ -66,7 +66,7 @@ requires-dist = [
     { name = "distro", marker = "sys_platform != 'darwin' and sys_platform != 'win32'" },
     { name = "markdown" },
     { name = "orjson" },
-    { name = "protobuf", specifier = ">=4.21" },
+    { name = "protobuf", specifier = ">=6.0,<8.0" },
     { name = "requests", extras = ["socks"] },
     { name = "typing-extensions" },
 ]