diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index b244921..2129da1 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -2082,8 +2082,7 @@
 
 #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
         if (pk_alg == MBEDTLS_PK_RSASSA_PSS) {
-            ret = mbedtls_pk_verify_ext(pk_alg, NULL,
-                                        peer_pk,
+            ret = mbedtls_pk_verify_new(pk_alg, peer_pk,
                                         md_alg, hash, hashlen,
                                         p, sig_len);
         } else
diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index 44525dd..372bf84 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -300,13 +300,13 @@
 
     MBEDTLS_SSL_DEBUG_BUF(3, "verify hash", verify_hash, verify_hash_len);
 
-    if ((ret = mbedtls_pk_verify_ext(sig_alg, NULL,
+    if ((ret = mbedtls_pk_verify_new(sig_alg,
                                      &ssl->session_negotiate->peer_cert->pk,
                                      md_alg, verify_hash, verify_hash_len,
                                      p, signature_len)) == 0) {
         return 0;
     }
-    MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_pk_verify_ext", ret);
+    MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_pk_verify_new", ret);
 
 error:
     /* RFC 8446 section 4.4.3
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 4ac5d9b..3947eb0 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -2060,7 +2060,7 @@
             flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
         }
 
-        if (mbedtls_pk_verify_ext(crl_list->sig_pk, NULL, &ca->pk,
+        if (mbedtls_pk_verify_new(crl_list->sig_pk, &ca->pk,
                                   crl_list->sig_md, hash, hash_length,
                                   crl_list->sig.p, crl_list->sig.len) != 0) {
             flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
@@ -2134,7 +2134,7 @@
     (void) rs_ctx;
 #endif
 
-    return mbedtls_pk_verify_ext(child->sig_pk, NULL, &parent->pk,
+    return mbedtls_pk_verify_new(child->sig_pk, &parent->pk,
                                  child->sig_md, hash, hash_len,
                                  child->sig.p, child->sig.len);
 }
diff --git a/tests/suites/test_suite_x509write.function b/tests/suites/test_suite_x509write.function
index 49ecc54..db571da 100644
--- a/tests/suites/test_suite_x509write.function
+++ b/tests/suites/test_suite_x509write.function
@@ -41,7 +41,7 @@
         goto cleanup;
     }
 
-    if (mbedtls_pk_verify_ext(csr.sig_pk, NULL, &csr.pk,
+    if (mbedtls_pk_verify_new(csr.sig_pk, &csr.pk,
                               csr.sig_md, hash, mbedtls_md_get_size_from_type(csr.sig_md),
                               csr.sig.p, csr.sig.len) != 0) {
         ret = MBEDTLS_ERR_X509_CERT_VERIFY_FAILED;