diff --git a/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java b/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
index c5bba7d..1e3621c 100644
--- a/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
+++ b/src/main/java/com/redislabs/redistimeseries/MultiRangeParams.java
@@ -52,13 +52,13 @@ public byte[][] getByteParams(Long from, Long to, String... filters) {
     List<byte[]> params = new ArrayList<>();
 
     if (from == null) {
-      params.add("-".getBytes());
+      params.add(RedisTimeSeries.MINUS);
     } else {
       params.add(Protocol.toByteArray(from));
     }
 
     if (to == null) {
-      params.add("+".getBytes());
+      params.add(RedisTimeSeries.PLUS);
     } else {
       params.add(Protocol.toByteArray(to));
     }
diff --git a/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java b/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
index 7a06c70..a8c5446 100644
--- a/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
+++ b/src/main/java/com/redislabs/redistimeseries/RedisTimeSeries.java
@@ -17,6 +17,8 @@
 public class RedisTimeSeries implements AutoCloseable {
 
   private static final byte[] STAR = SafeEncoder.encode("*");
+  protected static final byte[] PLUS = SafeEncoder.encode("+");
+  protected static final byte[] MINUS = SafeEncoder.encode("-");
 
   private final Pool<Jedis> pool;