diff --git a/server/java/src/main/java/AttestationStatement.java b/server/java/src/main/java/AttestationStatement.java
index 24d1c2e..e63f19c 100644
--- a/server/java/src/main/java/AttestationStatement.java
+++ b/server/java/src/main/java/AttestationStatement.java
@@ -79,7 +79,7 @@ public String getApkPackageName() {
     }
 
     public byte[] getApkDigestSha256() {
-        return Base64.decodeBase64(apkDigestSha256);
+        return apkDigestSha256 != null ? Base64.decodeBase64(apkDigestSha256) : new byte[0];
     }
 
     public byte[][] getApkCertificateDigestSha256() {