diff --git a/mercury-core/src/main/java/org/apache/maven/mercury/crypto/pgp/PgpStreamVerifierFactory.java b/mercury-core/src/main/java/org/apache/maven/mercury/crypto/pgp/PgpStreamVerifierFactory.java
index 9707a17..cca0b77 100644
--- a/mercury-core/src/main/java/org/apache/maven/mercury/crypto/pgp/PgpStreamVerifierFactory.java
+++ b/mercury-core/src/main/java/org/apache/maven/mercury/crypto/pgp/PgpStreamVerifierFactory.java
@@ -52,7 +52,7 @@
 
     private int algorithm = 0;
 
-    private int digestAlgorithm = PGPUtil.SHA1;
+    private int digestAlgorithm = PGPUtil.SHA512;
 
     // --------------------------------------------------------------------------------------------
     public PgpStreamVerifierFactory( StreamVerifierAttributes attributes, InputStream trustedPublicKeyRingStream )