diff --git a/generator.cpp b/generator.cpp
index 004fdec..0b36723 100644
--- a/generator.cpp
+++ b/generator.cpp
@@ -63,7 +63,7 @@ auto Generator::reseed(const std::string& s) -> void {
 
 	try {
 		std::string a{do_sha(to_be_hashed)};
-		std::memcpy(&G.k[0], &a[0], G.k.SizeInBytes());
+		std::memmove(&G.k[0], &a[0], G.k.SizeInBytes());
 		++G.ctr;
 	} catch(std::exception& e) {
 		fmt::print("{}", e.what());
@@ -128,7 +128,7 @@ auto Generator::do_crypto() -> std::string {
 	// 16 bytes --> 128bit
 	static constexpr const std::size_t ctr_length{16};
 	CryptoPP::FixedSizeSecBlock<CryptoPP::byte, ctr_length> ctr;
-	std::memcpy(&ctr, &G.ctr, ctr_length);
+	std::memmove(&ctr, &G.ctr, ctr_length);
 
 	try {
 		// fmt::print("plain text: {}\n", plain);
@@ -174,7 +174,7 @@ auto Generator::generate_blocks(unsigned int k_blocks) -> std::string {
 	try {
 		std::string da_key{""};
 		da_key.resize(G.k.size());
-		std::memcpy(&da_key[0], &G.k[0], G.k_length);
+		std::memmove(&da_key[0], &G.k[0], G.k_length);
 		// TODO(me): assert reseed_time > 100ms
 		reseed(do_sha(da_key));
 	} catch(std::exception& e) {
@@ -226,7 +226,7 @@ auto Generator::generate_random_data(uint n) -> std::string {
 
 		/* clear out the old key and set a new one */
 		std::memset(G.k, 0x00, G.k.size());
-		std::memcpy(&G.k[0], &dst[0], dst.size());
+		std::memmove(&G.k[0], &dst[0], dst.size());
 	} catch(std::exception& e) {
 		fmt::print("{}", e.what());
 	}