diff --git a/deeplearning4j/deeplearning4j-nn/src/main/java/org/deeplearning4j/nn/layers/mkldnn/MKLDNNSubsamplingHelper.java b/deeplearning4j/deeplearning4j-nn/src/main/java/org/deeplearning4j/nn/layers/mkldnn/MKLDNNSubsamplingHelper.java
index ff4b52ac5..3edbf0b28 100644
--- a/deeplearning4j/deeplearning4j-nn/src/main/java/org/deeplearning4j/nn/layers/mkldnn/MKLDNNSubsamplingHelper.java
+++ b/deeplearning4j/deeplearning4j-nn/src/main/java/org/deeplearning4j/nn/layers/mkldnn/MKLDNNSubsamplingHelper.java
@@ -69,9 +69,6 @@ public class MKLDNNSubsamplingHelper implements SubsamplingHelper {
             pad = ConvolutionUtils.getSameModeTopLeftPadding(new int[]{(int)epsilon.size(2), (int)epsilon.size(3)}, new int[] {(int)input.size(2), (int)input.size(3)}, kernel, strides, dilation);
         }
 
-        input = input.dup();
-        epsilon = epsilon.dup();
-
         Pooling2DConfig conf = Pooling2DConfig.builder()
                 .isSameMode(convolutionMode == ConvolutionMode.Same)
                 .kH(kernel[0]).kW(kernel[1])
diff --git a/nd4j/nd4j-remote/nd4j-json-server/pom.xml b/nd4j/nd4j-remote/nd4j-json-server/pom.xml
index ba4d97bd5..47ef995a9 100644
--- a/nd4j/nd4j-remote/nd4j-json-server/pom.xml
+++ b/nd4j/nd4j-remote/nd4j-json-server/pom.xml
@@ -123,6 +123,13 @@
       <artifactId>activation</artifactId>
       <version>1.1</version>
     </dependency>
+
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>${gson.version}</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>