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/XDocServlet.java b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
index 6fe6642..9a69e96 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/xdocs/XDocServlet.java
@@ -345,6 +345,7 @@
 
   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) {