diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocCache.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocCache.java
index c25d8d0..3031851 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocCache.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocCache.java
@@ -66,6 +66,7 @@
   }
 
   private String getParentsHash(Project.NameKey project) {
+    @SuppressWarnings("deprecation")
     Hasher h = Hashing.md5().newHasher();
     ProjectState p = projectCache.get(project);
     if (p != null) {
diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocLoader.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocLoader.java
index d98c037..324b0dd 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocLoader.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocLoader.java
@@ -252,6 +252,7 @@
       case UNIFIED:
         htmlHeader += "unified.xsl";
         break;
+      case NO_DIFF:
       default:
         log.error(String.format("Unsupported diff mode: %s", diffMode.name()));
         throw new ResourceNotFoundException();
diff --git a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
index c61128a..3fd86ba 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
@@ -361,6 +361,7 @@
 
   private static String computeETag(
       Project.NameKey project, ObjectId revId, String file, ObjectId revIdB, DiffMode diffMode) {
+    @SuppressWarnings("deprecation")
     Hasher hasher = Hashing.md5().newHasher();
     hasher.putUnencodedChars(project.get());
     if (revId != null) {