diff --git a/rpc/client/init.go b/rpc/client/init.go
index be8d066..e7d4398 100644
--- a/rpc/client/init.go
+++ b/rpc/client/init.go
@@ -55,7 +55,7 @@ func (c *Client) Init(info common.CallMethodInfo, opts ...CallOption) (MessageRe
 		StreamName:    info.Name,
 		ServerStreams: info.ServerStream(),
 		ClientStreams: info.ClientStream(),
-	}, toMethodName(info))
+	}, toMethodName(info), c.grpcCallOpts...)
 	if err != nil {
 		cancel()
 		return nil, err
diff --git a/rpc/client/options.go b/rpc/client/options.go
index 5711cd4..755b88b 100644
--- a/rpc/client/options.go
+++ b/rpc/client/options.go
@@ -24,6 +24,7 @@ type cfg struct {
 
 	tlsCfg       *tls.Config
 	grpcDialOpts []grpc.DialOption
+	grpcCallOpts []grpc.CallOption
 
 	conn Conn
 }
@@ -127,3 +128,10 @@ func WithGRPCDialOptions(opts []grpc.DialOption) Option {
 		c.grpcDialOpts = append(c.grpcDialOpts, opts...)
 	}
 }
+
+// WithGRPCDialOptions returns an option to specify grpc.Call.
+func WithGRPCCallOptions(opts []grpc.CallOption) Option {
+	return func(c *cfg) {
+		c.grpcCallOpts = append(c.grpcCallOpts, opts...)
+	}
+}