diff --git a/acme4j-utils/src/main/java/org/shredzone/acme4j/util/CertificateUtils.java b/acme4j-utils/src/main/java/org/shredzone/acme4j/util/CertificateUtils.java
index 82e7723e..66fdcb60 100644
--- a/acme4j-utils/src/main/java/org/shredzone/acme4j/util/CertificateUtils.java
+++ b/acme4j-utils/src/main/java/org/shredzone/acme4j/util/CertificateUtils.java
@@ -42,7 +42,6 @@ import org.bouncycastle.openssl.PEMParser;
 import org.bouncycastle.operator.OperatorCreationException;
 import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
 import org.bouncycastle.pkcs.PKCS10CertificationRequest;
-import org.shredzone.acme4j.Authorization;
 import org.shredzone.acme4j.Identifier;
 import org.shredzone.acme4j.challenge.TlsAlpn01Challenge;