diff --git a/extensions-core/datasketches/pom.xml b/extensions-core/datasketches/pom.xml
index a24ef61fb652..bc3b6f80b181 100644
--- a/extensions-core/datasketches/pom.xml
+++ b/extensions-core/datasketches/pom.xml
@@ -38,7 +38,7 @@
     <dependency>
       <groupId>com.yahoo.datasketches</groupId>
       <artifactId>sketches-core</artifactId>
-      <version>0.4.1</version>
+      <version>0.8.3</version>
     </dependency>
     <dependency>
       <groupId>io.druid</groupId>
diff --git a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchBufferAggregator.java b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchBufferAggregator.java
index 7f8f6000cbfb..03dc9d6372ca 100644
--- a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchBufferAggregator.java
+++ b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchBufferAggregator.java
@@ -19,10 +19,10 @@
 
 package io.druid.query.aggregation.datasketches.theta;
 
+import com.yahoo.memory.Memory;
+import com.yahoo.memory.MemoryRegion;
+import com.yahoo.memory.NativeMemory;
 import com.yahoo.sketches.Family;
-import com.yahoo.sketches.memory.Memory;
-import com.yahoo.sketches.memory.MemoryRegion;
-import com.yahoo.sketches.memory.NativeMemory;
 import com.yahoo.sketches.theta.SetOperation;
 import com.yahoo.sketches.theta.Union;
 import io.druid.query.aggregation.BufferAggregator;
diff --git a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchHolder.java b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchHolder.java
index 7752c3c20716..5f65e8a2e74f 100644
--- a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchHolder.java
+++ b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchHolder.java
@@ -24,9 +24,9 @@
 import com.google.common.collect.Ordering;
 import com.google.common.primitives.Doubles;
 import com.google.common.primitives.Longs;
+import com.yahoo.memory.Memory;
+import com.yahoo.memory.NativeMemory;
 import com.yahoo.sketches.Family;
-import com.yahoo.sketches.memory.Memory;
-import com.yahoo.sketches.memory.NativeMemory;
 import com.yahoo.sketches.theta.AnotB;
 import com.yahoo.sketches.theta.Intersection;
 import com.yahoo.sketches.theta.SetOperation;
diff --git a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchObjectStrategy.java b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchObjectStrategy.java
index 8e7b1f04638d..2e2550a0b3b4 100644
--- a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchObjectStrategy.java
+++ b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SketchObjectStrategy.java
@@ -19,8 +19,8 @@
 
 package io.druid.query.aggregation.datasketches.theta;
 
-import com.yahoo.sketches.memory.MemoryRegion;
-import com.yahoo.sketches.memory.NativeMemory;
+import com.yahoo.memory.MemoryRegion;
+import com.yahoo.memory.NativeMemory;
 import com.yahoo.sketches.theta.Sketch;
 import io.druid.java.util.common.IAE;
 import io.druid.segment.data.ObjectStrategy;
diff --git a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SynchronizedUnion.java b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SynchronizedUnion.java
index 1bcbf4ea07fe..819c68b8481a 100644
--- a/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SynchronizedUnion.java
+++ b/extensions-core/datasketches/src/main/java/io/druid/query/aggregation/datasketches/theta/SynchronizedUnion.java
@@ -19,7 +19,7 @@
 
 package io.druid.query.aggregation.datasketches.theta;
 
-import com.yahoo.sketches.memory.Memory;
+import com.yahoo.memory.Memory;
 import com.yahoo.sketches.theta.CompactSketch;
 import com.yahoo.sketches.theta.Sketch;
 import com.yahoo.sketches.theta.Union;
@@ -77,6 +77,12 @@ public synchronized void update(int[] data)
     delegate.update(data);
   }
 
+  @Override
+  public void update(char[] chars)
+  {
+    delegate.update(chars);
+  }
+
   @Override
   public synchronized void update(long[] data)
   {