diff --git a/WORKSPACE b/WORKSPACE
index e63a2a6..166f6db 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,27 +3,27 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "fc1bfdf008c4b07e7cc4214fdacf25560276f9c4",
+    commit = "2add9fecf8bec8634bddf354815bd0fa93f58dd5",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
 # Snapshot Plugin API
-#load(
-#    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
-#    "gerrit_api_maven_local",
-#)
-
-# Load snapshot Plugin API
-#gerrit_api_maven_local()
-
-# Release Plugin API
 load(
-    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
-    "gerrit_api",
+    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
+    "gerrit_api_maven_local",
 )
 
+# Load snapshot Plugin API
+gerrit_api_maven_local()
+
+# Release Plugin API
+#load(
+#    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
+#    "gerrit_api",
+#)
+
 # Load release Plugin API
-gerrit_api()
+#gerrit_api()
 
 load("//:external_plugin_deps.bzl", "external_plugin_deps")
 
diff --git a/src/main/java/com/googlesource/gerrit/plugins/renameproject/RenameCommand.java b/src/main/java/com/googlesource/gerrit/plugins/renameproject/RenameCommand.java
index 3625e9a..ef251db 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/renameproject/RenameCommand.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/renameproject/RenameCommand.java
@@ -32,6 +32,7 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.List;
+import java.util.NoSuchElementException;
 import org.kohsuke.args4j.Argument;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -66,7 +67,7 @@
       input.name = newProjectName;
       ProjectResource rsrc =
           new ProjectResource(
-              projectCacheProvider.get().get(Project.nameKey(projectControl)), self.get());
+              projectCacheProvider.get().get(Project.nameKey(projectControl)).get(), self.get());
       try (CommandProgressMonitor monitor = new CommandProgressMonitor(stdout)) {
         renameProject.assertCanRename(rsrc, input, monitor);
         List<Change.Id> changeIds = renameProject.getChanges(rsrc, monitor);
@@ -79,7 +80,7 @@
           stdout.flush();
         }
       }
-    } catch (RestApiException | IOException e) {
+    } catch (NoSuchElementException | RestApiException | IOException e) {
       throw die(e);
     }
   }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/renameproject/conditions/RenamePreconditions.java b/src/main/java/com/googlesource/gerrit/plugins/renameproject/conditions/RenamePreconditions.java
index 204c564..cab2957 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/renameproject/conditions/RenamePreconditions.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/renameproject/conditions/RenamePreconditions.java
@@ -25,7 +25,7 @@
 import com.google.gerrit.server.project.ProjectResource;
 import com.google.gerrit.server.restapi.project.ListChildProjects;
 import com.google.gerrit.server.submit.MergeOpRepoManager;
-import com.google.gerrit.server.submit.SubmoduleException;
+import com.google.gerrit.server.submit.SubmoduleConflictException;
 import com.google.gerrit.server.submit.SubmoduleOp;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
@@ -121,7 +121,7 @@
           throw new CannotRenameProjectException(message);
         }
       }
-    } catch (IOException | SubmoduleException e) {
+    } catch (IOException | SubmoduleConflictException e) {
       throw new CannotRenameProjectException(e);
     }
   }
diff --git a/src/test/java/com/googlesource/gerrit/plugins/renameproject/LockUnlockProjectTest.java b/src/test/java/com/googlesource/gerrit/plugins/renameproject/LockUnlockProjectTest.java
index aa3776f..02c47c5 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/renameproject/LockUnlockProjectTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/renameproject/LockUnlockProjectTest.java
@@ -34,10 +34,13 @@
 
   @Test
   public void testLockUnlockSucceeds() throws IOException, ConfigInvalidException {
-    assertThat(projectCache.get(project).getProject().getState()).isEqualTo(ProjectState.ACTIVE);
+    assertThat(projectCache.get(project).get().getProject().getState())
+        .isEqualTo(ProjectState.ACTIVE);
     lockUnlockInstance.lock(project);
-    assertThat(projectCache.get(project).getProject().getState()).isEqualTo(ProjectState.READ_ONLY);
+    assertThat(projectCache.get(project).get().getProject().getState())
+        .isEqualTo(ProjectState.READ_ONLY);
     lockUnlockInstance.unlock(project);
-    assertThat(projectCache.get(project).getProject().getState()).isEqualTo(ProjectState.ACTIVE);
+    assertThat(projectCache.get(project).get().getProject().getState())
+        .isEqualTo(ProjectState.ACTIVE);
   }
 }
diff --git a/src/test/java/com/googlesource/gerrit/plugins/renameproject/RenameIT.java b/src/test/java/com/googlesource/gerrit/plugins/renameproject/RenameIT.java
index 41bd819..6a450e9 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/renameproject/RenameIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/renameproject/RenameIT.java
@@ -29,6 +29,7 @@
 import com.google.gerrit.server.project.ProjectState;
 import com.google.inject.Inject;
 import java.util.List;
+import java.util.Optional;
 import javax.inject.Named;
 import org.eclipse.jgit.junit.TestRepository;
 import org.junit.Test;
@@ -55,8 +56,8 @@
     adminSshSession.exec(PLUGIN_NAME + " " + project.get() + " " + NEW_PROJECT_NAME);
 
     adminSshSession.assertSuccess();
-    ProjectState projectState = projectCache.get(Project.nameKey(NEW_PROJECT_NAME));
-    assertThat(projectState).isNotNull();
+    Optional<ProjectState> projectState = projectCache.get(Project.nameKey(NEW_PROJECT_NAME));
+    assertThat(projectState.isPresent()).isTrue();
     assertThat(queryProvider.get().byProject(project)).isEmpty();
     assertThat(queryProvider.get().byProject(Project.nameKey(NEW_PROJECT_NAME))).isNotEmpty();
   }
@@ -69,8 +70,8 @@
     adminSshSession.exec(PLUGIN_NAME + " " + project.get() + " " + newProjectName);
 
     adminSshSession.assertFailure();
-    ProjectState projectState = projectCache.get(Project.nameKey(newProjectName));
-    assertThat(projectState).isNull();
+    Optional<ProjectState> projectState = projectCache.get(Project.nameKey(newProjectName));
+    assertThat(projectState.isPresent()).isFalse();
   }
 
   @Test
@@ -80,8 +81,8 @@
     adminSshSession.exec(PLUGIN_NAME + " " + allProjects.get() + " " + NEW_PROJECT_NAME);
 
     adminSshSession.assertFailure();
-    ProjectState projectState = projectCache.get(Project.nameKey(NEW_PROJECT_NAME));
-    assertThat(projectState).isNull();
+    Optional<ProjectState> projectState = projectCache.get(Project.nameKey(NEW_PROJECT_NAME));
+    assertThat(projectState.isPresent()).isFalse();
   }
 
   @Test
diff --git a/src/test/java/com/googlesource/gerrit/plugins/renameproject/RevertRenameProjectTest.java b/src/test/java/com/googlesource/gerrit/plugins/renameproject/RevertRenameProjectTest.java
index c13f2e6..b895bfa 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/renameproject/RevertRenameProjectTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/renameproject/RevertRenameProjectTest.java
@@ -30,6 +30,7 @@
 import com.googlesource.gerrit.plugins.renameproject.RenameProject.Step;
 import com.googlesource.gerrit.plugins.renameproject.monitor.ProgressMonitor;
 import java.util.List;
+import java.util.Optional;
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.Mockito;
@@ -125,22 +126,22 @@
   }
 
   private void assertReverted() throws Exception {
-    ProjectState oldProjectState = projectCache.get(oldProjectKey);
-    assertThat(oldProjectState).isNotNull();
+    Optional<ProjectState> oldProjectState = projectCache.get(oldProjectKey);
+    assertThat(oldProjectState.isPresent()).isTrue();
 
-    ProjectState newProjectState = projectCache.get(newProjectKey);
-    assertThat(newProjectState).isNull();
+    Optional<ProjectState> newProjectState = projectCache.get(newProjectKey);
+    assertThat(newProjectState.isPresent()).isFalse();
 
     assertThat(queryProvider.get().byProject(oldProjectKey)).isNotEmpty();
     assertThat(queryProvider.get().byProject(newProjectKey)).isEmpty();
   }
 
   private void assertRenamed(Result result) throws Exception {
-    ProjectState oldProjectState = projectCache.get(oldProjectKey);
-    assertThat(oldProjectState).isNull();
+    Optional<ProjectState> oldProjectState = projectCache.get(oldProjectKey);
+    assertThat(oldProjectState.isPresent()).isFalse();
 
-    ProjectState newProjectState = projectCache.get(newProjectKey);
-    assertThat(newProjectState).isNotNull();
+    Optional<ProjectState> newProjectState = projectCache.get(newProjectKey);
+    assertThat(newProjectState.isPresent()).isTrue();
 
     if (renameProject.getStepsPerformed().contains(Step.DATABASE)) {
       ChangeApi changeApi = gApi.changes().id(NEW_PROJECT_NAME, result.getChange().getId().get());