diff --git a/src/main/java/org/opensearch/neuralsearch/processor/normalization/ScoreNormalizationFactory.java b/src/main/java/org/opensearch/neuralsearch/processor/normalization/ScoreNormalizationFactory.java
index 667c237c7..c42df96fe 100644
--- a/src/main/java/org/opensearch/neuralsearch/processor/normalization/ScoreNormalizationFactory.java
+++ b/src/main/java/org/opensearch/neuralsearch/processor/normalization/ScoreNormalizationFactory.java
@@ -19,7 +19,9 @@ public class ScoreNormalizationFactory {
         MinMaxScoreNormalizationTechnique.TECHNIQUE_NAME,
         new MinMaxScoreNormalizationTechnique(),
         L2ScoreNormalizationTechnique.TECHNIQUE_NAME,
-        new L2ScoreNormalizationTechnique()
+        new L2ScoreNormalizationTechnique(),
+        ZScoreNormalizationTechnique.TECHNIQUE_NAME,
+        new ZScoreNormalizationTechnique()
     );
 
     /**