diff --git a/rebar.config b/rebar.config
index ebabe67..e58b117 100644
--- a/rebar.config
+++ b/rebar.config
@@ -6,7 +6,7 @@
 {deps, []}.
 
 {plugins, [
-  {rebar3_gpb_plugin, "1.10.4"}
+  {rebar3_gpb_plugin, "2.2.7"}
 ]}.
 
 {gpb_opts, [
diff --git a/src/antidote_pb_codec.erl b/src/antidote_pb_codec.erl
index 2f95bba..4bdb26f 100644
--- a/src/antidote_pb_codec.erl
+++ b/src/antidote_pb_codec.erl
@@ -78,10 +78,10 @@
 
 -type response() ::
   {error_response, {ErrorCode :: error_code(), Message :: binary()}}
-| {start_transaction_resp, Resp :: {ok, TxId :: binary()} | {error, Reason::error_code()}}
+| {start_transaction_response, Resp :: {ok, TxId :: binary()} | {error, Reason::error_code()}}
 | {commit_response, {ok, CommitTime :: any()} | {error, Reason :: error_code()}}
-| {static_read_objects_resp, {ok, Results :: list(), CommitTime :: binary()}}
-| {read_objects_resp, Resp :: list()}.
+| {static_read_objects_response, {ok, Results :: [{bound_object(), read_result()}], CommitTime :: binary()}}
+| {read_objects_response, Resp :: [{bound_object(), read_result()}]}.
 
 -type message() :: request() | response().