diff --git a/src/Mayaqua/Encrypt.c b/src/Mayaqua/Encrypt.c
index fed18bdb..fab64387 100644
--- a/src/Mayaqua/Encrypt.c
+++ b/src/Mayaqua/Encrypt.c
@@ -88,6 +88,7 @@ int ssl_clientcert_index = 0;
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 static OSSL_PROVIDER *ossl_provider_legacy = NULL;
 static OSSL_PROVIDER *ossl_provider_default = NULL;
+static OSSL_PROVIDER *ossl_provider_oqsprovider = NULL;
 #endif
 
 LOCK **ssl_lock_obj = NULL;
@@ -3974,6 +3975,12 @@ void FreeCryptLibrary()
 		OSSL_PROVIDER_unload(ossl_provider_legacy);
 		ossl_provider_legacy = NULL;
 	}
+
+	if (ossl_provider_oqsprovider != NULL)
+	{
+		OSSL_PROVIDER_unload(ossl_provider_oqsprovider);
+		ossl_provider_oqsprovider = NULL;
+	}
 #endif
 }
 
@@ -3996,6 +4003,7 @@ void InitCryptLibrary()
 #if OPENSSL_VERSION_NUMBER >= 0x30000000L
 	ossl_provider_default = OSSL_PROVIDER_load(NULL, "legacy");
 	ossl_provider_legacy = OSSL_PROVIDER_load(NULL, "default");
+	ossl_provider_oqsprovider = OSSL_PROVIDER_load(NULL, "oqsprovider");
 #endif
 
 	ssl_clientcert_index = SSL_get_ex_new_index(0, "struct SslClientCertInfo *", NULL, NULL, NULL);
diff --git a/src/Mayaqua/Network.c b/src/Mayaqua/Network.c
index 1ca4b708..6b53ecfb 100644
--- a/src/Mayaqua/Network.c
+++ b/src/Mayaqua/Network.c
@@ -11905,6 +11905,10 @@ bool StartSSLEx3(SOCK *sock, X *x, K *priv, LIST *chain, UINT ssl_timeout, char
 		Unlock(openssl_lock);
 	}
 
+	#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+		SSL_set1_groups_list(sock->ssl, PQ_GROUP_LIST);
+	#endif
+	
 	if (sock->ServerMode)
 	{
 //		Lock(ssl_connect_lock);
@@ -11984,7 +11988,7 @@ bool StartSSLEx3(SOCK *sock, X *x, K *priv, LIST *chain, UINT ssl_timeout, char
 		//		Unlock(ssl_connect_lock);
 	}
 	else
-	{
+	{	
 		prev_timeout = GetTimeout(sock);
 		SetTimeout(sock, ssl_timeout);
 		// Client mode
diff --git a/src/Mayaqua/Network.h b/src/Mayaqua/Network.h
index 39e3f5fc..94a50c2b 100644
--- a/src/Mayaqua/Network.h
+++ b/src/Mayaqua/Network.h
@@ -59,6 +59,10 @@ struct DYN_VALUE
 
 #define	DEFAULT_CIPHER_LIST			"ECDHE+AESGCM:ECDHE+CHACHA20:DHE+AESGCM:DHE+CHACHA20:ECDHE+AES256:DHE+AES256:RSA+AES"
 
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#define PQ_GROUP_LIST				"p521_kyber1024:x25519_kyber768:P-521:X25519:P-256"
+#endif
+
 // SSL logging function
 //#define	ENABLE_SSL_LOGGING
 #define	SSL_LOGGING_DIRNAME			"@ssl_log"