diff --git a/pyproject.toml b/pyproject.toml
index d3f19e6e4..5d44ce958 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
 
 [project.optional-dependencies]
 tests = [
-    "grpcio==1.59.2",
+    "grpcio==1.59.3",
     "protobuf==3.20.3",
     "pytest==7.4.3",
     "pytest-cov==4.1.0",