diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java b/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
index 9d4c4d4d..05d8de7e 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/Account.java
@@ -203,7 +203,7 @@ public class Account extends AcmeJsonResource {
 
             JSONBuilder payloadClaim = new JSONBuilder();
             payloadClaim.put("account", getLocation());
-            payloadClaim.putKey("newKey", newKeyPair.getPublic());
+            payloadClaim.putKey("oldKey", getLogin().getKeyPair().getPublic());
 
             JsonWebSignature innerJws = new JsonWebSignature();
             innerJws.setPayload(payloadClaim.toString());
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
index 81bf399e..786be1cc 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/AccountTest.java
@@ -320,10 +320,10 @@ public class AccountTest {
                     StringBuilder expectedPayload = new StringBuilder();
                     expectedPayload.append('{');
                     expectedPayload.append("\"account\":\"").append(locationUrl).append("\",");
-                    expectedPayload.append("\"newKey\":{");
-                    expectedPayload.append("\"kty\":\"").append(TestUtils.D_KTY).append("\",");
-                    expectedPayload.append("\"e\":\"").append(TestUtils.D_E).append("\",");
-                    expectedPayload.append("\"n\":\"").append(TestUtils.D_N).append("\"");
+                    expectedPayload.append("\"oldKey\":{");
+                    expectedPayload.append("\"kty\":\"").append(TestUtils.KTY).append("\",");
+                    expectedPayload.append("\"e\":\"").append(TestUtils.E).append("\",");
+                    expectedPayload.append("\"n\":\"").append(TestUtils.N).append("\"");
                     expectedPayload.append("}}");
                     assertThat(decodedPayload, sameJSONAs(expectedPayload.toString()));
                 } catch (JoseException ex) {