diff --git a/tools/cert_create/src/cert.c b/tools/cert_create/src/cert.c
index 1b84e36..3f0b4d3 100644
--- a/tools/cert_create/src/cert.c
+++ b/tools/cert_create/src/cert.c
@@ -90,7 +90,7 @@
 	X509_NAME *name;
 	ASN1_INTEGER *sno;
 	int i, num, rc = 0;
-	EVP_MD_CTX mdCtx;
+	EVP_MD_CTX *mdCtx;
 	EVP_PKEY_CTX *pKeyCtx = NULL;
 
 	/* Create the certificate structure */
@@ -111,10 +111,14 @@
 		issuer = x;
 	}
 
-	EVP_MD_CTX_init(&mdCtx);
+	mdCtx = EVP_MD_CTX_create();
+	if (mdCtx == NULL) {
+		ERR_print_errors_fp(stdout);
+		goto END;
+	}
 
 	/* Sign the certificate with the issuer key */
-	if (!EVP_DigestSignInit(&mdCtx, &pKeyCtx, EVP_sha256(), NULL, ikey)) {
+	if (!EVP_DigestSignInit(mdCtx, &pKeyCtx, EVP_sha256(), NULL, ikey)) {
 		ERR_print_errors_fp(stdout);
 		goto END;
 	}
@@ -184,7 +188,7 @@
 		}
 	}
 
-	if (!X509_sign_ctx(x, &mdCtx)) {
+	if (!X509_sign_ctx(x, mdCtx)) {
 		ERR_print_errors_fp(stdout);
 		goto END;
 	}
@@ -194,7 +198,7 @@
 	cert->x = x;
 
 END:
-	EVP_MD_CTX_cleanup(&mdCtx);
+	EVP_MD_CTX_destroy(mdCtx);
 	return rc;
 }
 
diff --git a/tools/cert_create/src/ext.c b/tools/cert_create/src/ext.c
index 8ae6640..055ddbf 100644
--- a/tools/cert_create/src/ext.c
+++ b/tools/cert_create/src/ext.c
@@ -166,7 +166,7 @@
 	int sz;
 
 	/* OBJECT_IDENTIFIER with hash algorithm */
-	algorithm = OBJ_nid2obj(md->type);
+	algorithm = OBJ_nid2obj(EVP_MD_type(md));
 	if (algorithm == NULL) {
 		return NULL;
 	}
diff --git a/tools/cert_create/src/key.c b/tools/cert_create/src/key.c
index e8257e9..871f9ee 100644
--- a/tools/cert_create/src/key.c
+++ b/tools/cert_create/src/key.c
@@ -43,13 +43,31 @@
 
 static int key_create_rsa(key_t *key)
 {
-	RSA *rsa;
+	BIGNUM *e;
+	RSA *rsa = NULL;
 
-	rsa = RSA_generate_key(RSA_KEY_BITS, RSA_F4, NULL, NULL);
+	e = BN_new();
+	if (e == NULL) {
+		printf("Cannot create RSA exponent\n");
+		goto err;
+	}
+
+	if (!BN_set_word(e, RSA_F4)) {
+		printf("Cannot assign RSA exponent\n");
+		goto err;
+	}
+
+	rsa = RSA_new();
 	if (rsa == NULL) {
 		printf("Cannot create RSA key\n");
 		goto err;
 	}
+
+	if (!RSA_generate_key_ex(rsa, RSA_KEY_BITS, e, NULL)) {
+		printf("Cannot generate RSA key\n");
+		goto err;
+	}
+
 	if (!EVP_PKEY_assign_RSA(key->key, rsa)) {
 		printf("Cannot assign RSA key\n");
 		goto err;
@@ -58,6 +76,7 @@
 	return 1;
 err:
 	RSA_free(rsa);
+	BN_free(e);
 	return 0;
 }
 
diff --git a/tools/cert_create/src/main.c b/tools/cert_create/src/main.c
index df59961..741242f 100644
--- a/tools/cert_create/src/main.c
+++ b/tools/cert_create/src/main.c
@@ -244,7 +244,7 @@
 int main(int argc, char *argv[])
 {
 	STACK_OF(X509_EXTENSION) * sk;
-	X509_EXTENSION *cert_ext;
+	X509_EXTENSION *cert_ext = NULL;
 	ext_t *ext;
 	key_t *key;
 	cert_t *cert;