diff --git a/pkg/libcose/Makefile.dep b/pkg/libcose/Makefile.dep
index da93126dd0..f62a5eb7f2 100644
--- a/pkg/libcose/Makefile.dep
+++ b/pkg/libcose/Makefile.dep
@@ -2,6 +2,14 @@ USEPKG += nanocbor
 
 USEMODULE += libcose_crypt
 
+USEMODULE += random
+
 ifneq (,$(filter libcose_crypt_hacl,$(USEMODULE)))
   USEPKG += hacl
 endif
+ifneq (,$(filter libcose_crypt_monocypher,$(USEMODULE)))
+  USEPKG += monocypher
+endif
+ifneq (,$(filter libcose_crypt_c25519,$(USEMODULE)))
+  USEPKG += c25519
+endif
diff --git a/pkg/libcose/Makefile.include b/pkg/libcose/Makefile.include
index 3215fa1c9f..d2b027bfe6 100644
--- a/pkg/libcose/Makefile.include
+++ b/pkg/libcose/Makefile.include
@@ -4,6 +4,12 @@ CFLAGS += -DUSE_CBOR_CONTEXT
 ifneq (,$(filter libcose_crypt_hacl,$(USEMODULE)))
   CFLAGS += -DCRYPTO_HACL
 endif
+ifneq (,$(filter libcose_crypt_monocypher,$(USEMODULE)))
+  CFLAGS += -DCRYPTO_MONOCYPHER
+endif
+ifneq (,$(filter libcose_crypt_c25519,$(USEMODULE)))
+  CFLAGS += -DCRYPTO_C25519
+endif
 
 # Declare pseudomodules here to be selfcontained
 PSEUDOMODULES += libcose_crypt_%
diff --git a/pkg/libcose/patches/0001-RIOT-Use-RIOT-random_bytes-function-instead-of-rando.patch b/pkg/libcose/patches/0001-RIOT-Use-RIOT-random_bytes-function-instead-of-rando.patch
index 1ae4b2f3be..66a174ab70 100644
--- a/pkg/libcose/patches/0001-RIOT-Use-RIOT-random_bytes-function-instead-of-rando.patch
+++ b/pkg/libcose/patches/0001-RIOT-Use-RIOT-random_bytes-function-instead-of-rando.patch
@@ -1,14 +1,39 @@
-From ed69076abbe83ed256f1e1fbdf74726961c9071e Mon Sep 17 00:00:00 2001
+From 0104f8d1558fbd40d25dc48291508b3eac9965fa Mon Sep 17 00:00:00 2001
 From: Kaspar Schleiser <kaspar@schleiser.de>
 Date: Fri, 5 Jul 2019 14:51:09 +0200
 Subject: [PATCH] RIOT: Use RIOT random_bytes function instead of randombytes
 
 ---
- src/crypt/hacl.c | 6 +++---
- 1 file changed, 3 insertions(+), 3 deletions(-)
+ src/crypt/c25519.c     | 5 ++---
+ src/crypt/hacl.c       | 6 +++---
+ src/crypt/monocypher.c | 7 +++----
+ 3 files changed, 8 insertions(+), 10 deletions(-)
 
+diff --git a/src/crypt/c25519.c b/src/crypt/c25519.c
+index c23749b..f30e92a 100644
+--- a/src/crypt/c25519.c
++++ b/src/crypt/c25519.c
+@@ -17,8 +17,7 @@
+ #include "cose/crypto.h"
+ #include "cose/crypto/c25519.h"
+ #include "cose/crypto/selectors.h"
+-
+-extern void randombytes(uint8_t *target, uint64_t n);
++#include "random.h"
+ 
+ #ifdef CRYPTO_C25519_INCLUDE_ED25519
+ int cose_crypto_sign_ed25519(const cose_key_t *key, uint8_t *sign, size_t *signlen, uint8_t *msg, unsigned long long int msglen)
+@@ -38,7 +37,7 @@ int cose_crypto_verify_ed25519(const cose_key_t *key, const uint8_t *sign, size_
+ 
+ void cose_crypto_keypair_ed25519(cose_key_t *key)
+ {
+-    randombytes(key->d, EDSIGN_SECRET_KEY_SIZE);
++    random_bytes(key->d, EDSIGN_SECRET_KEY_SIZE);
+     edsign_sec_to_pub(key->x, key->d);
+ }
+ 
 diff --git a/src/crypt/hacl.c b/src/crypt/hacl.c
-index c24d751732..3bdcabf95e 100644
+index c24d751..3bdcabf 100644
 --- a/src/crypt/hacl.c
 +++ b/src/crypt/hacl.c
 @@ -19,10 +19,10 @@
@@ -41,6 +66,38 @@ index c24d751732..3bdcabf95e 100644
      return COSE_CRYPTO_AEAD_CHACHA20POLY1305_NONCEBYTES;
  }
  #endif /* CRYPTO_HACL_INCLUDE_CHACHAPOLY */
+diff --git a/src/crypt/monocypher.c b/src/crypt/monocypher.c
+index 9e4dcbc..d1fcac1 100644
+--- a/src/crypt/monocypher.c
++++ b/src/crypt/monocypher.c
+@@ -17,8 +17,7 @@
+ #include <monocypher.h>
+ #include "cose/crypto.h"
+ #include "cose/crypto/selectors.h"
+-
+-extern void randombytes(uint8_t *target, uint64_t n);
++#include "random.h"
+ 
+ #ifdef CRYPTO_MONOCYPHER_INCLUDE_CHACHAPOLY
+ static uint32_t load32_le(const uint8_t *u)
+@@ -105,7 +104,7 @@ COSE_ssize_t cose_crypto_keygen_chachapoly(uint8_t *sk, size_t len)
+     if (len < 64) {
+         return COSE_ERR_NOMEM;
+     }
+-    randombytes((unsigned char*)sk, 64);
++    random_bytes((unsigned char*)sk, 64);
+     return 64;
+ }
+ #endif /* CRYPTO_MONOCYPHER_INCLUDE_CHACHAPOLY */
+@@ -133,7 +132,7 @@ static void _ed25519_clamp(uint8_t *key)
+ 
+ void cose_crypto_keypair_ed25519(cose_key_t *key)
+ {
+-    randombytes(key->d, COSE_CRYPTO_SIGN_ED25519_SECRETKEYBYTES);
++    random_bytes(key->d, COSE_CRYPTO_SIGN_ED25519_SECRETKEYBYTES);
+     _ed25519_clamp(key->d);
+     crypto_sign_public_key(key->x, key->d);
+ }
 -- 
-2.22.0
+2.21.0