diff --git a/include/generate.h b/include/generate.h
index 863fe12..1f05bc3 100644
--- a/include/generate.h
+++ b/include/generate.h
@@ -1,3 +1,3 @@
 #pragma once
 
-void generate(short min_char_count, short max_char_count, short min_num_count, short max_num_count, int count);
+void generate(short min_char_count, short max_char_count, short min_num_count, short max_num_count, int count, std::string seed);
diff --git a/src/generate.cc b/src/generate.cc
index f641dfe..5f9c84f 100644
--- a/src/generate.cc
+++ b/src/generate.cc
@@ -2,9 +2,19 @@
 #include <random>
 #include <chrono>
 
-void generate(short min_char_count, short max_char_count, short min_num_count, short max_num_count, int count)
+void generate(short min_char_count, short max_char_count, short min_num_count, short max_num_count, int count, std::string seed)
 {
-	std::mt19937 engine(std::chrono::system_clock::now().time_since_epoch().count());
+	std::mt19937 engine;
+
+	if(seed != "")
+	{
+		std::seed_seq seq(seed.begin(),seed.end());
+		engine.seed(seq);
+	}
+	else
+	{
+		engine.seed(std::chrono::system_clock::now().time_since_epoch().count());
+	}
 
 	std::uniform_int_distribution<short> char_count_distribution(min_char_count, max_char_count);
 	std::uniform_int_distribution<char> char_distribution('a', 'z');
diff --git a/src/main.cc b/src/main.cc
index 3a81bd5..91ddfb4 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -12,6 +12,7 @@ int main(int argc, char** argv)
 		("min-num", "The minimum number of digits", cxxopts::value<short>()->default_value("0"))
 		("max-num", "The maximum number of digits", cxxopts::value<short>()->default_value("4"))
 		("count", "How many usernames should be generated", cxxopts::value<int>()->default_value("1"))
+		("seed", "String used as seed sequence. If not defined, system time will be used instead.", cxxopts::value<std::string>()->default_value(""))
 		("h,help", "Print help")
 	;
 
@@ -28,6 +29,7 @@ int main(int argc, char** argv)
 	short min_num = result["min-num"].as<short>();
 	short max_num = result["max-num"].as<short>();
 	int count = result["count"].as<int>();
+	std::string seed(result["seed"].as<std::string>());
 
 	if(min_char > max_char)
 	{
@@ -53,6 +55,6 @@ int main(int argc, char** argv)
 		return -1;
 	}
 
-	generate(min_char, max_char, min_num, max_num, count);
+	generate(min_char, max_char, min_num, max_num, count, seed);
 	return 0;
 }