diff --git a/.bazelversion b/.bazelversion
index 227cea2..7ec1d6d 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-2.0.0
+2.1.0
diff --git a/WORKSPACE b/WORKSPACE
index f456e4c..5fa28f9 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -20,7 +20,7 @@
 
 load("//tools:bazlets.bzl", "load_bazlets")
 
-load_bazlets(commit = "f53f51fb660552d0581aa0ba52c3836ed63d56a3")
+load_bazlets(commit = "f30a992da9fc855dce819875afb59f9dd6f860cd")
 
 load(
     "@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl",
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/dfs/DfsGarbageCollectorTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/dfs/DfsGarbageCollectorTest.java
index 6e0762f..f235b2e 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/dfs/DfsGarbageCollectorTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/dfs/DfsGarbageCollectorTest.java
@@ -19,7 +19,6 @@
 import java.util.concurrent.TimeUnit;
 
 import org.eclipse.jgit.internal.storage.dfs.DfsObjDatabase.PackSource;
-import org.eclipse.jgit.internal.storage.dfs.DfsRefDatabase;
 import org.eclipse.jgit.internal.storage.reftable.RefCursor;
 import org.eclipse.jgit.internal.storage.reftable.ReftableConfig;
 import org.eclipse.jgit.internal.storage.reftable.ReftableReader;
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/StatsTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/StatsTest.java
index e492737..6c4b4a4 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/StatsTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/util/StatsTest.java
@@ -12,7 +12,6 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import org.eclipse.jgit.util.Stats;
 import org.junit.Test;
 
 public class StatsTest {
diff --git a/pom.xml b/pom.xml
index d0a5c83..3d9acd4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -234,7 +234,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-shade-plugin</artifactId>
-          <version>3.2.1</version>
+          <version>3.2.2</version>
         </plugin>
 
         <plugin>
@@ -846,12 +846,12 @@
               <dependency>
                 <groupId>org.codehaus.plexus</groupId>
                 <artifactId>plexus-compiler-javac</artifactId>
-                <version>2.8.5</version>
+                <version>2.8.6</version>
               </dependency>
               <dependency>
                 <groupId>org.codehaus.plexus</groupId>
                 <artifactId>plexus-compiler-javac-errorprone</artifactId>
-                <version>2.8.5</version>
+                <version>2.8.6</version>
               </dependency>
               <!-- override plexus-compiler-javac-errorprone's dependency on
                   Error Prone with the latest version -->
@@ -890,7 +890,7 @@
               <dependency>
                 <groupId>org.codehaus.plexus</groupId>
                 <artifactId>plexus-compiler-eclipse</artifactId>
-                <version>2.8.5</version>
+                <version>2.8.6</version>
               </dependency>
               <dependency>
                 <groupId>org.eclipse.jdt</groupId>