diff --git a/pyproject.toml b/pyproject.toml
index 20617ad..7d644fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,8 +11,8 @@ requires = [
   # versions can't work with code that was generated with newer versions.
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#backwards
   "protobuf == 6.33.5",
-  "grpcio-tools == 1.72.1",
-  "grpcio == 1.72.1",
+  "grpcio-tools == 1.81.0",
+  "grpcio == 1.81.0",
 
 ]
 build-backend = "setuptools.build_meta"
@@ -48,11 +48,11 @@ dependencies = [
   # We can't widen beyond the current value unless we bump the minimum
   # requirements too because of protobuf cross-version runtime guarantees:
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#major
-  "protobuf >= 6.32.1, < 8", # Do not widen beyond 8!
+  "protobuf >= 6.33.5, < 8", # Do not widen beyond 8!
   # We couldn't find any document with a spec about the cross-version runtime
   # guarantee for grpcio, so unless we find one in the future, we'll assume
   # major version jumps are not compatible
-  "grpcio >= 1.72.1, < 2", # Do not widen beyond 2!
+  "grpcio >= 1.81.0, < 2", # Do not widen beyond 2!
 ]
 dynamic = ["version"]