diff --git a/internal/applicant/acme_ca.go b/internal/applicant/acme_ca.go
index ea0c6b74..03d9dd65 100644
--- a/internal/applicant/acme_ca.go
+++ b/internal/applicant/acme_ca.go
@@ -19,6 +19,8 @@ var sslProviderUrls = map[string]string{
 	sslProviderBuypass:             "https://api.buypass.com/acme/directory",
 	sslProviderGoogleTrustServices: "https://dv.acme-v02.api.pki.goog/directory",
 	sslProviderSSLCom:              "https://acme.ssl.com/sslcom-dv-rsa",
+	sslProviderSSLCom + "RSA":      "https://acme.ssl.com/sslcom-dv-rsa",
+	sslProviderSSLCom + "ECC":      "https://acme.ssl.com/sslcom-dv-ecc",
 	sslProviderZeroSSL:             "https://acme.zerossl.com/v2/DV90",
 }
 
diff --git a/internal/applicant/applicant.go b/internal/applicant/applicant.go
index 52e43991..93ab30ae 100644
--- a/internal/applicant/applicant.go
+++ b/internal/applicant/applicant.go
@@ -153,8 +153,15 @@ func apply(challengeProvider challenge.Provider, options *applicantOptions) (*Ap
 
 	// Create an ACME client config
 	config := lego.NewConfig(user)
-	config.CADirURL = sslProviderUrls[user.CA]
 	config.Certificate.KeyType = parseKeyAlgorithm(domain.CertificateKeyAlgorithmType(options.KeyAlgorithm))
+	config.CADirURL = sslProviderUrls[user.CA]
+	if user.CA == sslProviderSSLCom {
+		if strings.HasPrefix(options.KeyAlgorithm, "RSA") {
+			config.CADirURL = sslProviderUrls[sslProviderSSLCom+"RSA"]
+		} else if strings.HasPrefix(options.KeyAlgorithm, "EC") {
+			config.CADirURL = sslProviderUrls[sslProviderSSLCom+"ECC"]
+		}
+	}
 
 	// Create an ACME client
 	client, err := lego.NewClient(config)
@@ -217,6 +224,8 @@ func parseKeyAlgorithm(algo domain.CertificateKeyAlgorithmType) certcrypto.KeyTy
 		return certcrypto.EC256
 	case domain.CertificateKeyAlgorithmTypeEC384:
 		return certcrypto.EC384
+	case domain.CertificateKeyAlgorithmTypeEC512:
+		return certcrypto.KeyType("P512")
 	}
 
 	return certcrypto.RSA2048