diff -Naur a/lasso/lasso.c b/lasso/lasso.c
--- a/lasso/lasso.c	2024-04-02 08:48:00.452071137 -0400
+++ b/lasso/lasso.c	2024-04-02 08:47:09.337931309 -0400
@@ -270,7 +270,7 @@
 	 * xmlsec-crypto library.
 	 */
 #ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING
-	if (xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) {
+	if (xmlSecCryptoDLLoadLibrary(BAD_CAST xmlSecGetDefaultCrypto()) < 0) {
 		message(G_LOG_LEVEL_CRITICAL,
 				"Unable to load default xmlsec-crypto library. Make sure"
 				"that you have it installed and check shared libraries path"
diff -Naur a/lasso/xml/tools.c b/lasso/xml/tools.c
--- a/lasso/xml/tools.c	2023-03-06 06:05:02.761160572 -0500
+++ b/lasso/xml/tools.c	2024-04-02 09:09:19.739795636 -0400
@@ -47,6 +47,7 @@
 #include <libxml/xmlIO.h>
 
 #include <openssl/evp.h>
+#include <openssl/pem.h>
 
 #include <xmlsec/base64.h>
 #include <xmlsec/crypto.h>
@@ -308,8 +309,8 @@
 			pub_key = lasso_get_public_key_from_pem_cert_file(file);
 			break;
 		case LASSO_PEM_FILE_TYPE_PUB_KEY:
-			pub_key = xmlSecCryptoAppKeyLoad(file,
-					xmlSecKeyDataFormatPem, NULL, NULL, NULL);
+			pub_key = xmlSecCryptoAppKeyLoadEx(file,
+					xmlSecKeyDataTypePublic, xmlSecKeyDataFormatPem, NULL, NULL, NULL);
 			break;
 		case LASSO_PEM_FILE_TYPE_PRIVATE_KEY:
 			pub_key = lasso_get_public_key_from_private_key_file(file);
@@ -377,8 +378,8 @@
 static xmlSecKeyPtr
 lasso_get_public_key_from_private_key_file(const char *private_key_file)
 {
-	return xmlSecCryptoAppKeyLoad(private_key_file,
-			xmlSecKeyDataFormatPem, NULL, NULL, NULL);
+	return xmlSecCryptoAppKeyLoadEx(private_key_file,
+			xmlSecKeyDataTypePublic, xmlSecKeyDataFormatPem, NULL, NULL, NULL);
 }
 
 /**
@@ -1449,7 +1450,7 @@
 	}
 }
 
-static void structuredErrorFunc (void *userData, xmlErrorPtr error) {
+static void structuredErrorFunc (void *userData, const xmlError * error) {
 		*(int*)userData = error->code;
 }