diff --git a/WORKSPACE b/WORKSPACE
index fb0d4f6..872b0e9 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,27 +3,27 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "4909dd878ded009edc140319246a2e0681763743",
+    commit = "f30a992da9fc855dce819875afb59f9dd6f860cd",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
 # Release Plugin API
-load(
-    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
-    "gerrit_api",
-)
-
-# Snapshot Plugin API
 #load(
-#    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
-#    "gerrit_api_maven_local",
+#    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
+#    "gerrit_api",
 #)
 
+# Snapshot Plugin API
+load(
+    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
+    "gerrit_api_maven_local",
+)
+
 # Load release Plugin API
-gerrit_api()
+#gerrit_api()
 
 # Load snapshot Plugin API
-#gerrit_api_maven_local()
+gerrit_api_maven_local()
 
 load(":external_plugin_deps.bzl", "external_plugin_deps")
 
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index b272d6c..794ea56 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -1,13 +1,13 @@
 load("//tools/bzl:maven_jar.bzl", "GERRIT", "MAVEN_CENTRAL", "MAVEN_LOCAL", "maven_jar")
 
-JGIT_VERSION = "5.3.6.201910020505-r"
+JGIT_VERSION = "5.5.1.201910021850-r"
 REPO = MAVEN_CENTRAL
 
 def external_plugin_deps():
     maven_jar(
         name = "jgit-http-apache",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.http.apache:" + JGIT_VERSION,
-        sha1 = "668c69822b4f54b430dd9880cc2bb13f13aa88d1",
+        sha1 = "aaf5367ff2cba4174b4165ed0a64dc92cac75871",
         repository = REPO,
         unsign = True,
         exclude = [
@@ -19,7 +19,7 @@
     maven_jar(
         name = "jgit-lfs",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.lfs:" + JGIT_VERSION,
-        sha1 = "153e32275cb0ccfd7f6dba89cf58392d42e16c3a",
+        sha1 = "c37af6b2d28df21942e935753922333c8612cef2",
         repository = REPO,
         unsign = True,
         exclude = [
@@ -31,7 +31,7 @@
     maven_jar(
         name = "jgit-lfs-server",
         artifact = "org.eclipse.jgit:org.eclipse.jgit.lfs.server:" + JGIT_VERSION,
-        sha1 = "e37339c77dd00d96269e280d582c742c424b908f",
+        sha1 = "7df786dfb9843a01e46cbf48ef921c5aac087ca1",
         repository = REPO,
         unsign = True,
         exclude = [
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsGlobalConfig.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsGlobalConfig.java
index ebbc81c..3f92417 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsGlobalConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsGlobalConfig.java
@@ -15,6 +15,7 @@
 package com.googlesource.gerrit.plugins.lfs;
 
 import com.google.common.collect.Maps;
+import com.google.gerrit.extensions.restapi.Response;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.server.project.ProjectResource;
@@ -35,7 +36,7 @@
   }
 
   @Override
-  public LfsGlobalConfigInfo apply(ProjectResource resource) throws RestApiException {
+  public Response apply(ProjectResource resource) throws RestApiException {
     adminView.validate(resource);
 
     LfsGlobalConfigInfo info = new LfsGlobalConfigInfo();
@@ -56,6 +57,6 @@
         info.namespaces.put(section.getNamespace(), sectionInfo);
       }
     }
-    return info;
+    return Response.ok(info);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsProjectConfig.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsProjectConfig.java
index 07c1d7d..aedfad1 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsProjectConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/GetLfsProjectConfig.java
@@ -14,6 +14,7 @@
 
 package com.googlesource.gerrit.plugins.lfs;
 
+import com.google.gerrit.extensions.restapi.Response;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.server.project.ProjectResource;
@@ -31,7 +32,7 @@
   }
 
   @Override
-  public LfsProjectConfigInfo apply(ProjectResource resource) throws RestApiException {
+  public Response apply(ProjectResource resource) throws RestApiException {
     LfsProjectConfigInfo info = new LfsProjectConfigInfo();
     LfsProjectConfigSection config =
         lfsConfigFactory.getProjectsConfig().getForProject(resource.getNameKey());
@@ -41,6 +42,6 @@
       info.readOnly = config.isReadOnly();
       info.backend = config.getBackend();
     }
-    return info;
+    return Response.ok(info);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsApiServlet.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsApiServlet.java
index 992dada..59d4e97 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsApiServlet.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsApiServlet.java
@@ -22,7 +22,7 @@
 import static com.google.gerrit.server.permissions.ProjectPermission.PUSH_AT_LEAST_ONE_REF;
 
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.ProjectUtil;
 import com.google.gerrit.server.permissions.PermissionBackend;
@@ -31,6 +31,7 @@
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import com.googlesource.gerrit.plugins.lfs.auth.LfsAuthUserProvider;
+import java.util.Optional;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.eclipse.jgit.lfs.errors.LfsException;
@@ -82,13 +83,14 @@
     }
     String projName = matcher.group(1);
     Project.NameKey project = Project.nameKey(ProjectUtil.stripGitSuffix(projName));
-    ProjectState state = projectCache.get(project);
-    if (state == null || state.getProject().getState() == HIDDEN) {
+    Optional<ProjectState> state = projectCache.get(project);
+    if (!state.isPresent() || state.get().getProject().getState() == HIDDEN) {
       throw new LfsRepositoryNotFound(project.get());
     }
-    authorizeUser(userProvider.getUser(auth, projName, request.getOperation()), state, request);
+    authorizeUser(
+        userProvider.getUser(auth, projName, request.getOperation()), state.get(), request);
 
-    if (request.isUpload() && state.getProject().getState() == READ_ONLY) {
+    if (request.isUpload() && state.get().getProject().getState() == READ_ONLY) {
       throw new LfsRepositoryReadOnly(project.get());
     }
 
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsProjectsConfig.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsProjectsConfig.java
index ea5e076..3263c1a 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsProjectsConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsProjectsConfig.java
@@ -14,12 +14,12 @@
 
 package com.googlesource.gerrit.plugins.lfs;
 
-import static com.google.gerrit.reviewdb.client.RefNames.REFS_CONFIG;
+import static com.google.gerrit.entities.RefNames.REFS_CONFIG;
 
 import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.extensions.annotations.PluginName;
-import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.config.AllProjectsName;
 import com.google.gerrit.server.git.meta.VersionedMetaData;
 import com.google.gerrit.server.project.ProjectCache;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsRepositoryResolver.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsRepositoryResolver.java
index 59cdb13..0d3b705 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsRepositoryResolver.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/LfsRepositoryResolver.java
@@ -16,7 +16,7 @@
 
 import com.google.common.base.Strings;
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.entities.Project;
 import com.google.inject.Inject;
 import java.util.Map;
 import org.eclipse.jgit.lfs.errors.LfsRepositoryNotFound;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/PutLfsGlobalConfig.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/PutLfsGlobalConfig.java
index ea4e44e..8a5457a 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/PutLfsGlobalConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/PutLfsGlobalConfig.java
@@ -20,12 +20,13 @@
 import static com.googlesource.gerrit.plugins.lfs.LfsProjectConfigSection.KEY_READ_ONLY;
 
 import com.google.common.base.Strings;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.extensions.annotations.PluginName;
 import com.google.gerrit.extensions.restapi.ResourceConflictException;
 import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.Response;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.extensions.restapi.RestModifyView;
-import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.git.meta.MetaDataUpdate;
 import com.google.gerrit.server.project.ProjectResource;
 import com.google.inject.Inject;
@@ -63,7 +64,7 @@
   }
 
   @Override
-  public LfsGlobalConfigInfo apply(ProjectResource resource, LfsGlobalConfigInput input)
+  public Response apply(ProjectResource resource, LfsGlobalConfigInput input)
       throws RestApiException {
     adminView.validate(resource);
     Project.NameKey projectName = resource.getNameKey();
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsGetLocksAction.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsGetLocksAction.java
index a84d458..48dceea 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsGetLocksAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsGetLocksAction.java
@@ -19,8 +19,8 @@
 import static com.google.gerrit.server.permissions.ProjectPermission.ACCESS;
 
 import com.google.common.base.Strings;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.extensions.restapi.AuthException;
-import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.permissions.PermissionBackend;
 import com.google.gerrit.server.permissions.PermissionBackend.ForProject;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksAction.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksAction.java
index 32536f7..e8d46c2 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksAction.java
@@ -22,8 +22,9 @@
 import static org.eclipse.jgit.util.HttpSupport.HDR_AUTHORIZATION;
 
 import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.entities.Project;
+import com.google.gerrit.exceptions.StorageException;
 import com.google.gerrit.extensions.restapi.AuthException;
-import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.ProjectUtil;
 import com.google.gerrit.server.permissions.PermissionBackend;
@@ -34,6 +35,7 @@
 import com.googlesource.gerrit.plugins.lfs.auth.LfsAuthUserProvider;
 import com.googlesource.gerrit.plugins.lfs.locks.LfsLocksHandler.LfsLockExistsException;
 import java.io.IOException;
+import java.util.Optional;
 import org.eclipse.jgit.lfs.errors.LfsException;
 import org.eclipse.jgit.lfs.errors.LfsRepositoryNotFound;
 import org.eclipse.jgit.lfs.errors.LfsUnauthorized;
@@ -71,9 +73,12 @@
       String name = getProjectName();
       ProjectState project = getProject(name);
       CurrentUser user = getUser(name);
-      ProjectState state = projectCache.checkedGet(project.getNameKey());
+      Optional<ProjectState> state = projectCache.get(project.getNameKey());
+      if (!state.isPresent()) {
+        throw new LfsRepositoryNotFound(project.getNameKey().get());
+      }
       try {
-        authorizeUser(permissionBackend.user(user).project(state.getNameKey()));
+        authorizeUser(permissionBackend.user(user).project(state.get().getNameKey()));
       } catch (AuthException | PermissionBackendException e) {
         throwUnauthorizedOp(getAction(), project, user);
       }
@@ -84,7 +89,7 @@
       context.sendError(SC_NOT_FOUND, e.getMessage());
     } catch (LfsLockExistsException e) {
       context.sendError(SC_CONFLICT, e.error);
-    } catch (LfsException e) {
+    } catch (LfsException | StorageException e) {
       context.sendError(SC_INTERNAL_SERVER_ERROR, e.getMessage());
     }
   }
@@ -101,11 +106,11 @@
 
   protected ProjectState getProject(String name) throws LfsRepositoryNotFound {
     Project.NameKey project = Project.nameKey(ProjectUtil.stripGitSuffix(name));
-    ProjectState state = projectCache.get(project);
-    if (state == null || state.getProject().getState() == HIDDEN) {
+    Optional<ProjectState> state = projectCache.get(project);
+    if (!state.isPresent() || state.get().getProject().getState() == HIDDEN) {
       throw new LfsRepositoryNotFound(project.get());
     }
-    return state;
+    return state.get();
   }
 
   protected CurrentUser getUser(String project) {
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksHandler.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksHandler.java
index 1de28f4..8ba263e 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksHandler.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsLocksHandler.java
@@ -18,7 +18,7 @@
 import com.google.common.cache.LoadingCache;
 import com.google.common.collect.ImmutableList;
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.cache.CacheModule;
 import com.google.inject.Inject;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsProjectLocks.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsProjectLocks.java
index 4526fa4..b02e089 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsProjectLocks.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/locks/LfsProjectLocks.java
@@ -17,7 +17,7 @@
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
 import com.google.common.flogger.FluentLogger;
-import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.server.CurrentUser;
 import com.google.inject.Inject;
 import com.google.inject.assistedinject.Assisted;
diff --git a/src/test/java/com/googlesource/gerrit/plugins/lfs/LfsIT.java b/src/test/java/com/googlesource/gerrit/plugins/lfs/LfsIT.java
index c71a83c..a3c77a3 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/lfs/LfsIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/lfs/LfsIT.java
@@ -16,7 +16,7 @@
 
 import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
 import com.google.gerrit.acceptance.TestPlugin;
-import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.entities.Project;
 import com.google.gerrit.testing.ConfigSuite;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Test;