diff --git a/bin/proof-generator/include/nil/proof-generator/arg_parser.hpp b/bin/proof-generator/include/nil/proof-generator/arg_parser.hpp
index 0f528fed..44b703eb 100644
--- a/bin/proof-generator/include/nil/proof-generator/arg_parser.hpp
+++ b/bin/proof-generator/include/nil/proof-generator/arg_parser.hpp
@@ -46,6 +46,7 @@ namespace nil {
             columns_params columns = all_columns_params[0];
             lambda_param lambda = all_lambda_params[0];
             grind_param grind = all_grind_params[0];
+            std::size_t expand_factor = 2;
         };
 
         std::optional<prover_options> parse_args(int argc, char* argv[]);
diff --git a/bin/proof-generator/include/nil/proof-generator/prover.hpp b/bin/proof-generator/include/nil/proof-generator/prover.hpp
index 3c86118f..bda66940 100644
--- a/bin/proof-generator/include/nil/proof-generator/prover.hpp
+++ b/bin/proof-generator/include/nil/proof-generator/prover.hpp
@@ -142,12 +142,14 @@ namespace nil {
                 boost::filesystem::path circuit_file_name,
                 boost::filesystem::path preprocessed_common_data_file_name,
                 boost::filesystem::path assignment_table_file_name,
-                boost::filesystem::path proof_file
+                boost::filesystem::path proof_file,
+                std::size_t expand_factor
             )
                 : circuit_file_(circuit_file_name)
                 , preprocessed_common_data_file_(preprocessed_common_data_file_name)
                 , assignment_table_file_(assignment_table_file_name)
-                , proof_file_(proof_file) {
+                , proof_file_(proof_file)
+                , expand_factor_(expand_factor) {
             }
 
             bool generate_to_file(bool skip_verification) {
@@ -334,7 +336,9 @@ namespace nil {
                 // Lambdas and grinding bits should be passed threw preprocessor directives
                 std::size_t table_rows_log = std::ceil(std::log2(table_description_->rows_amount));
 
-                fri_params_.emplace(detail::create_fri_params<typename Lpc::fri_type, BlueprintField>(table_rows_log));
+                fri_params_.emplace(
+                    detail::create_fri_params<typename Lpc::fri_type, BlueprintField>(table_rows_log, 1, expand_factor_)
+                );
 
                 std::size_t permutation_size = table_description_->witness_columns
                     + table_description_->public_input_columns + ComponentConstantColumns;
@@ -364,6 +368,7 @@ namespace nil {
             const boost::filesystem::path preprocessed_common_data_file_;
             const boost::filesystem::path assignment_table_file_;
             const boost::filesystem::path proof_file_;
+            const std::size_t expand_factor_;
 
             // All set on prepare_for_operation()
             std::optional<PublicPreprocessedData> public_preprocessed_data_;
diff --git a/bin/proof-generator/src/arg_parser.cpp b/bin/proof-generator/src/arg_parser.cpp
index e9f4662a..785e2d9f 100644
--- a/bin/proof-generator/src/arg_parser.cpp
+++ b/bin/proof-generator/src/arg_parser.cpp
@@ -90,6 +90,7 @@ namespace nil {
                 ("columns-params", po::value(&prover_options.columns)->default_value(prover_options.columns), "Columns params, use --list-columns-params to list")
                 ("lambda-param", po::value(&prover_options.lambda)->default_value(prover_options.lambda), "Lambda param (9)")
                 ("grind-param", po::value(&prover_options.lambda)->default_value(prover_options.lambda), "Grind param (69)")
+                ("expand-factor", po::value(&prover_options.expand_factor)->default_value(prover_options.expand_factor), "Expand factor")
                 ("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");
             // clang-format on
diff --git a/bin/proof-generator/src/main.cpp b/bin/proof-generator/src/main.cpp
index f7fb4f98..f4c2925a 100644
--- a/bin/proof-generator/src/main.cpp
+++ b/bin/proof-generator/src/main.cpp
@@ -42,7 +42,8 @@ int run_prover(const nil::proof_generator::prover_options& prover_options) {
             prover_options.circuit_file_path,
             prover_options.preprocessed_common_data_path,
             prover_options.assignment_table_file_path,
-            prover_options.proof_file_path
+            prover_options.proof_file_path,
+            prover_options.expand_factor
         );
         bool prover_result;
         try {