diff --git a/java/google/registry/repositories.bzl b/java/google/registry/repositories.bzl
index 202e7eb49..700e5258a 100644
--- a/java/google/registry/repositories.bzl
+++ b/java/google/registry/repositories.bzl
@@ -72,6 +72,7 @@ def domain_registry_repositories(
         omit_com_google_googlejavaformat_google_java_format = False,
         omit_com_google_guava = False,
         omit_com_google_guava_testlib = False,
+        omit_com_google_gwt_user = False,
         omit_com_google_http_client = False,
         omit_com_google_http_client_appengine = False,
         omit_com_google_http_client_jackson2 = False,
@@ -88,6 +89,7 @@ def domain_registry_repositories(
         omit_com_google_template_soy = False,
         omit_com_google_truth = False,
         omit_com_google_truth_extensions_truth_java8_extension = False,
+        omit_com_googlecode_java_diff_utils_diffutils = False,
         omit_com_googlecode_charts4j = False,
         omit_com_googlecode_json_simple = False,
         omit_com_ibm_icu_icu4j = False,
@@ -117,6 +119,7 @@ def domain_registry_repositories(
         omit_javax_inject = False,
         omit_javax_mail = False,
         omit_javax_servlet_api = False,
+        omit_javax_validation_api = False,
         omit_javax_xml_bind_jaxb_api = False,
         omit_javax_xml_soap_api = False,
         omit_javax_xml_ws_jaxws_api = False,
@@ -262,6 +265,8 @@ def domain_registry_repositories(
         com_google_guava()
     if not omit_com_google_guava_testlib:
         com_google_guava_testlib()
+    if not omit_com_google_gwt_user:
+        com_google_gwt_user()
     if not omit_com_google_http_client:
         com_google_http_client()
     if not omit_com_google_http_client_appengine:
@@ -294,6 +299,8 @@ def domain_registry_repositories(
         com_google_truth()
     if not omit_com_google_truth_extensions_truth_java8_extension:
         com_google_truth_extensions_truth_java8_extension()
+    if not omit_com_googlecode_java_diff_utils_diffutils:
+        com_googlecode_java_diff_utils_diffutils()
     if not omit_com_googlecode_charts4j:
         com_googlecode_charts4j()
     if not omit_com_googlecode_json_simple:
@@ -352,6 +359,8 @@ def domain_registry_repositories(
         javax_mail()
     if not omit_javax_servlet_api:
         javax_servlet_api()
+    if not omit_javax_validation_api:
+        javax_validation_api()
     if not omit_javax_xml_bind_jaxb_api:
         javax_xml_bind_jaxb_api()
     if not omit_javax_xml_soap_api:
@@ -1342,6 +1351,23 @@ def com_google_guava_testlib():
         ],
     )
 
+def com_google_gwt_user():
+    java_import_external(
+        name = "com_google_gwt_user",
+        neverlink = 1,
+        licenses = ["notice"],  # GWT Terms
+        jar_sha256 = "9f420f0d0c2f177d71cb1794b3be1418f9755f6e4181101af3951b8302b9556d",
+        jar_urls = [
+            "http://maven.ibiblio.org/maven2/com/google/gwt/gwt-user/2.8.2/gwt-user-2.8.2.jar",
+            "http://repo1.maven.org/maven2/com/google/gwt/gwt-user/2.8.2/gwt-user-2.8.2.jar",
+        ],
+        deps = [
+            "@javax_validation_api",
+            "@javax_servlet_api",
+            "@org_w3c_css_sac",
+        ],
+    )
+
 def com_google_http_client():
     java_import_external(
         name = "com_google_http_client",
@@ -1547,6 +1573,7 @@ def com_google_truth():
             "@junit",
             "@com_google_auto_value",
             "@com_google_errorprone_error_prone_annotations",
+            "@com_googlecode_java_diff_utils_diffutils",
         ],
     )
 
@@ -1577,6 +1604,17 @@ def com_googlecode_charts4j():
         licenses = ["notice"],  # The MIT License
     )
 
+def com_googlecode_java_diff_utils_diffutils():
+    java_import_external(
+        name = "com_googlecode_java_diff_utils_diffutils",
+        licenses = ["notice"],  # The Apache Software License, Version 2.0
+        jar_sha256 = "61ba4dc49adca95243beaa0569adc2a23aedb5292ae78aa01186fa782ebdc5c2",
+        jar_urls = [
+            "http://maven.ibiblio.org/maven2/com/googlecode/java-diff-utils/diffutils/1.3.0/diffutils-1.3.0.jar",
+            "http://repo1.maven.org/maven2/com/googlecode/java-diff-utils/diffutils/1.3.0/diffutils-1.3.0.jar",
+        ],
+    )
+
 def com_googlecode_json_simple():
     java_import_external(
         name = "com_googlecode_json_simple",
@@ -1907,6 +1945,17 @@ def javax_servlet_api():
         licenses = ["notice"],  # Apache
     )
 
+def javax_validation_api():
+    java_import_external(
+        name = "javax_validation_api",
+        licenses = ["notice"],  # Apache License, Version 2.0
+        jar_sha256 = "e459f313ebc6db2483f8ceaad39af07086361b474fa92e40f442e8de5d9895dc",
+        jar_urls = [
+            "http://maven.ibiblio.org/maven2/javax/validation/validation-api/1.0.0.GA/validation-api-1.0.0.GA.jar",
+            "http://repo1.maven.org/maven2/javax/validation/validation-api/1.0.0.GA/validation-api-1.0.0.GA.jar",
+        ],
+    )
+
 def javax_xml_bind_jaxb_api():
     java_import_external(
         name = "javax_xml_bind_jaxb_api",