updated dependencies
diff --git a/pom.xml b/pom.xml
index a433479..5d108b7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -151,7 +151,7 @@
     <dependency>
       <groupId>com.yahoo.datasketches</groupId>
       <artifactId>memory</artifactId>
-      <version>0.10.1</version>
+      <version>0.10.2</version>
     </dependency>
 
     <!-- Pig -->
@@ -180,7 +180,7 @@
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-mapreduce-client-core</artifactId>
-      <version>2.8.0</version>
+      <version>2.8.1</version>
       <optional>true</optional>
       <exclusions>
         <exclusion>
@@ -201,7 +201,7 @@
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-mapreduce-client-common</artifactId>
-      <version>2.8.0</version>
+      <version>2.8.1</version>
       <optional>true</optional>
     </dependency>
 
@@ -392,7 +392,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.19.1</version>
+        <version>2.20</version>
         <configuration>
           <!-- locale settings must be set on the command line before startup -->
           <!-- set heap size to work around https://github.com/travis-ci/travis-ci/issues/3396 -->
@@ -420,7 +420,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-dependency-plugin</artifactId>
-          <version>3.0.0</version>
+          <version>3.0.1</version>
         </plugin>
 
         <plugin>
@@ -462,7 +462,7 @@
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>license-maven-plugin</artifactId>
-          <version>1.12</version>
+          <version>1.13</version>
         </plugin>
 
         <plugin>