diff --git a/src/bip39.cpp b/src/bip39.cpp
index 07f5b74..72f2b31 100644
--- a/src/bip39.cpp
+++ b/src/bip39.cpp
@@ -121,6 +121,7 @@ word_list generate_mnemonic(entropy_bits_t entropy /* = entropy_bits::_128 */, l
     assert((word_count % MNEMONIC_WORD_MULTIPLE) == 0);
 
     random_bytes_engine rbe;
+    rbe.seed(std::random_device()());
     std::vector<uint8_t> data(entropy_bits / BYTE_BITS);
     std::generate(begin(data), end(data), [&rbe]() { return static_cast<uint8_t>(std::ref(rbe)()); });
     return create_mnemonic(data, lang);