diff --git a/pyproject.toml b/pyproject.toml
index 0681ef4..8e0fdc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ dependencies = [
 
   # Pin at least the things we import directly.
   "click==8.1.7",
-  "grpcio==1.59.2",
+  "grpcio==1.59.3",
   "protobuf==4.25.1",
 ]