diff --git a/src/main/native/c/drbg.c b/src/main/native/c/drbg.c
index 8d21813..7f360e2 100644
--- a/src/main/native/c/drbg.c
+++ b/src/main/native/c/drbg.c
@@ -15,8 +15,8 @@
  *
  */
 #include <drbg.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <sys/random.h>
 #include <unistd.h>
 
 DRBGParams NO_PARAMS = { DEFAULT_STRENGTH, 0, 0, NULL, 0, NULL, 0 };
@@ -148,7 +148,7 @@ int generate_seed(DRBG* generator, byte output[], int n_bytes) {
     if (parent != NULL) {
         return next_rand(parent, output, n_bytes);
     } else {
-        return arc4random_buf(output, n_bytes);
+        return getrandom(output, n_bytes, 0);
     }
 }
 
@@ -159,7 +159,7 @@ void reseed(DRBG* generator) {
 void reseed_with_params(DRBG *generator, DRBGParams *params) {
     byte seed[128]; // TODO: what should the default seed size be?
     size_t length = 128;
-    arc4random_buf(seed, length);
+    getrandom(seed, length, 0);
     EVP_RAND_reseed(generator->context, params->prediction_resistance, seed, length, params->additional_data, params->additional_data_length);
 }