diff --git a/src/mospy/Account.py b/src/mospy/Account.py
index 0aed81e..032fc03 100644
--- a/src/mospy/Account.py
+++ b/src/mospy/Account.py
@@ -51,6 +51,7 @@ def __init__(
             "cosmos": "cosmospy_protobuf",
             "osmosis": "osmosis_protobuf",
             "evmos": "evmos_protobuf",
+            "sentinel": "sentinel_protobuf",
         }
         _protobuf_package = (_protobuf_packages[protobuf.lower()]
                              if protobuf.lower() in _protobuf_packages.keys()
diff --git a/src/mospy/Transaction.py b/src/mospy/Transaction.py
index 2b32c23..4159a55 100644
--- a/src/mospy/Transaction.py
+++ b/src/mospy/Transaction.py
@@ -45,6 +45,7 @@ def __init__(
             "cosmos": "cosmospy_protobuf",
             "osmosis": "osmosis_protobuf",
             "evmos": "evmos_protobuf",
+            "sentinel": "sentinel_protobuf",
         }
         self._protobuf_package = (_protobuf_packages[protobuf.lower()]
                                   if protobuf.lower()
diff --git a/src/mospy/clients/GRPCClient.py b/src/mospy/clients/GRPCClient.py
index 5cc3647..c6733cc 100644
--- a/src/mospy/clients/GRPCClient.py
+++ b/src/mospy/clients/GRPCClient.py
@@ -32,6 +32,7 @@ def __init__(
             "cosmos": "cosmospy_protobuf",
             "osmosis": "osmosis_protobuf",
             "evmos": "evmos_protobuf",
+            "sentinel": "sentinel_protobuf",
         }
         _protobuf_package = (_protobuf_packages[protobuf.lower()]
                              if protobuf.lower() in _protobuf_packages.keys()