diff --git a/ethereumj-core/src/main/java/org/ethereum/db/Repository.java b/ethereumj-core/src/main/java/org/ethereum/db/Repository.java
index 8babea95..a437fd0c 100644
--- a/ethereumj-core/src/main/java/org/ethereum/db/Repository.java
+++ b/ethereumj-core/src/main/java/org/ethereum/db/Repository.java
@@ -6,6 +6,7 @@ import org.ethereum.core.Block;
 import org.ethereum.core.Blockchain;
 import org.ethereum.core.Genesis;
 import org.ethereum.crypto.HashUtil;
+import org.ethereum.json.EtherObjectMapper;
 import org.ethereum.json.JSONHelper;
 import org.ethereum.listener.EthereumListener;
 import org.ethereum.manager.WorldManager;
@@ -17,9 +18,6 @@ import org.iq80.leveldb.DBIterator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.spongycastle.util.encoders.Hex;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.node.JsonNodeFactory;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 
@@ -409,8 +407,7 @@ public class Repository {
             ObjectNode blockNode = jsonFactory.objectNode();
             JSONHelper.dumpBlock(blockNode, block, gasUsed, this.getWorldState().getRootHash(), keys, this);
             
-            ObjectMapper mapper = new ObjectMapper();
-            mapper.enable(SerializationFeature.INDENT_OUTPUT);
+            EtherObjectMapper mapper = new EtherObjectMapper();
             bw.write(mapper.writeValueAsString(blockNode));
 
         } catch (IOException e) {
diff --git a/ethereumj-core/src/main/java/org/ethereum/json/EtherObjectMapper.java b/ethereumj-core/src/main/java/org/ethereum/json/EtherObjectMapper.java
new file mode 100644
index 00000000..2304e40e
--- /dev/null
+++ b/ethereumj-core/src/main/java/org/ethereum/json/EtherObjectMapper.java
@@ -0,0 +1,65 @@
+package org.ethereum.json;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.core.JsonGenerationException;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.io.SegmentedStringWriter;
+import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/**
+ * An extended {@link com.fasterxml.jackson.databind.ObjectMapper ObjectMapper} class to 
+ * customize ethereum state dumps.
+ * 
+ * @author Alon Muroch
+ *
+ */
+public class EtherObjectMapper extends ObjectMapper {
+
+	@Override
+	public String writeValueAsString(Object value)
+	        throws JsonProcessingException {        
+	        // alas, we have to pull the recycler directly here...
+	        SegmentedStringWriter sw = new SegmentedStringWriter(_jsonFactory._getBufferRecycler());
+	        try {
+	        	JsonGenerator ge = _jsonFactory.createGenerator(sw);
+	        	// set ethereum custom pretty printer
+	        	EtherPrettyPrinter pp = new EtherPrettyPrinter();
+	        	ge.setPrettyPrinter(pp);
+	        	
+	            _configAndWriteValue(ge, value);
+	        } catch (JsonProcessingException e) { // to support [JACKSON-758]
+	            throw e;
+	        } catch (IOException e) { // shouldn't really happen, but is declared as possibility so:
+	            throw JsonMappingException.fromUnexpectedIOE(e);
+	        }
+	        return sw.getAndClear();
+	    }
+	
+	/**
+	 * An extended {@link com.fasterxml.jackson.core.util.DefaultPrettyPrinter} class to customize 
+	 * an ethereum {@link com.fasterxml.jackson.core.PrettyPrinter Pretty Printer} Generator
+	 * 
+	 * @author Alon Muroch
+	 *
+	 */
+	public class EtherPrettyPrinter extends DefaultPrettyPrinter {
+
+		public EtherPrettyPrinter() {
+			super();
+		}
+		
+		@Override
+		public void writeObjectFieldValueSeparator(JsonGenerator jg)
+		        throws IOException, JsonGenerationException {
+				/**
+				 * Custom object separator (Default is " : ") to make it easier to compare state dumps with other
+				 * ethereum client implementations
+				 */
+				jg.writeRaw(": ");
+		    }
+	}
+}