diff --git a/bin/proof-generator/include/nil/proof-generator/prover.hpp b/bin/proof-generator/include/nil/proof-generator/prover.hpp
index 192be3e9..e18b9d2b 100644
--- a/bin/proof-generator/include/nil/proof-generator/prover.hpp
+++ b/bin/proof-generator/include/nil/proof-generator/prover.hpp
@@ -202,9 +202,10 @@ namespace nil {
                 }
 
                 BOOST_LOG_TRIVIAL(info) << "Writing json proof to " << json_file_;
-                std::ofstream output_file;
-                output_file.open(json_file_);
-                output_file << nil::blueprint::recursive_verifier_generator<
+                auto output_file = open_file<std::ofstream>(json_file_.string(), std::ios_base::out);
+                if( !output_file ) return res;
+
+                (*output_file) << nil::blueprint::recursive_verifier_generator<
                     PlaceholderParams,
                     nil::crypto3::zk::snark::placeholder_proof<BlueprintField, PlaceholderParams>,
                     typename nil::crypto3::zk::snark::placeholder_public_preprocessor<BlueprintField, PlaceholderParams>::preprocessed_data_type::common_data_type
@@ -213,7 +214,7 @@ namespace nil {
                     *public_inputs_, proof,
                     (*constraint_system_).public_input_sizes()
                 );
-                output_file.close();
+                output_file->close();
 
                 return res;
             }
diff --git a/bin/proof-generator/src/arg_parser.cpp b/bin/proof-generator/src/arg_parser.cpp
index 01c93988..11d96e31 100644
--- a/bin/proof-generator/src/arg_parser.cpp
+++ b/bin/proof-generator/src/arg_parser.cpp
@@ -71,16 +71,16 @@ namespace nil {
             // clang-format off
             auto options_appender = config.add_options()
                 ("proof,p", make_defaulted_option(prover_options.proof_file_path), "Output proof file")
-                ("json,json", make_defaulted_option(prover_options.json_file_path), "JSON proof file")
-                ("common-data", make_defaulted_option(prover_options.preprocessed_common_data_path), "Output preprocessed common data file")
+                ("json,j", make_defaulted_option(prover_options.json_file_path), "JSON proof file")
+                ("common-data,d", make_defaulted_option(prover_options.preprocessed_common_data_path), "Output preprocessed common data file")
                 ("circuit,c", po::value(&prover_options.circuit_file_path)->required(), "Circuit input file")
                 ("assignment-table,t", po::value(&prover_options.assignment_table_file_path)->required(), "Assignment table input file")
                 ("log-level,l", make_defaulted_option(prover_options.log_level), "Log level (trace, debug, info, warning, error, fatal)")
                 ("elliptic-curve-type,e", make_defaulted_option(prover_options.elliptic_curve_type), "Elliptic curve type (pallas)")
                 ("hash-type", make_defaulted_option(prover_options.hash_type), "Hash type (keccak, poseidon)")
-                ("lambda-param", make_defaulted_option(prover_options.lambda), "Lambda param (9)")
+                ("lambda-param,l", make_defaulted_option(prover_options.lambda), "Lambda param (9)")
                 ("grind-param", make_defaulted_option(prover_options.grind), "Grind param (69)")
-                ("expand-factor", make_defaulted_option(prover_options.expand_factor), "Expand factor")
+                ("expand-factor,x", make_defaulted_option(prover_options.expand_factor), "Expand factor")
                 ("component-constant-columns", make_defaulted_option(prover_options.component_constant_columns), "Component constant columns")
                 ("skip-verification", po::bool_switch(&prover_options.skip_verification), "Skip generated proof verifying step")
                 ("verification-only", po::bool_switch(&prover_options.verification_only), "Read proof for verification instead of writing to it");
@@ -240,7 +240,9 @@ namespace nil {
         GENERATE_READ_OPERATOR(CURVE_TYPES, CurvesVariant)
 #undef X
 
-#define HASH_TYPES X(nil::crypto3::hashes::keccak_1600<256>, "keccak") X(nil::crypto3::hashes::poseidon<nil::crypto3::hashes::detail::mina_poseidon_policy<typename nil::crypto3::algebra::curves::pallas::base_field_type>>, "poseidon")
+#define HASH_TYPES \
+    X(nil::crypto3::hashes::keccak_1600<256>, "keccak") \
+    X(nil::crypto3::hashes::poseidon<nil::crypto3::hashes::detail::mina_poseidon_policy<typename nil::crypto3::algebra::curves::pallas::base_field_type>>, "poseidon")
 #define X(type, name) TYPE_TO_STRING(type, name)
         GENERATE_WRITE_OPERATOR(HASH_TYPES, HashesVariant)
 #undef X