diff --git a/core/src/main/java/jenkins/security/apitoken/ApiTokenStore.java b/core/src/main/java/jenkins/security/apitoken/ApiTokenStore.java
index f2c8d7f37e3596a3835de173e0cae8ff1e286703..4e4f4ca0ca229f28684706cfaf4cf97a72b2165e 100644
--- a/core/src/main/java/jenkins/security/apitoken/ApiTokenStore.java
+++ b/core/src/main/java/jenkins/security/apitoken/ApiTokenStore.java
@@ -75,7 +75,7 @@ public class ApiTokenStore {
         this.init();
     }
     
-    private ApiTokenStore readResolve() {
+    private Object readResolve() {
         this.init();
         return this;
     }
@@ -356,7 +356,7 @@ public class ApiTokenStore {
             this.init();
         }
     
-        private HashedToken readResolve() {
+        private Object readResolve() {
             this.init();
             return this;
         }
diff --git a/essentials.yml b/essentials.yml
index c1d2a77dccf8f5f4fe8a947020558500b2881783..56b3c264dccba079ac154b83b607b64d28ed5a9a 100644
--- a/essentials.yml
+++ b/essentials.yml
@@ -2,5 +2,6 @@
 ath:
   useLocalSnapshots: false
   athRevision: "06caf67d37d945ec5228a80d73714fac692c28d3"
+  athImage: "jenkins/ath:acceptance-test-harness-1.62"
   categories:
     - org.jenkinsci.test.acceptance.junit.SmokeTest