diff --git a/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/codec/OCSFCodec.java b/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/codec/OCSFCodec.java
index 3fb31b2226..0d963f0135 100644
--- a/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/codec/OCSFCodec.java
+++ b/data-prepper-plugins/s3-source/src/main/java/org/opensearch/dataprepper/plugins/source/s3/codec/OCSFCodec.java
@@ -1,6 +1,8 @@
 package org.opensearch.dataprepper.plugins.source.s3.codec;
 
+import com.fasterxml.jackson.databind.MappingIterator;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
 import org.opensearch.dataprepper.model.annotations.DataPrepperPlugin;
 import org.opensearch.dataprepper.model.annotations.DataPrepperPluginConstructor;
 import org.opensearch.dataprepper.model.codec.InputCodec;
@@ -8,15 +10,13 @@
 import org.opensearch.dataprepper.model.record.Record;
 import org.opensearch.dataprepper.plugins.processor.model.datatypes.ocsf.OCSF;
 
-import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.util.function.Consumer;
 
 @DataPrepperPlugin(name = "ocsf", pluginType = InputCodec.class, pluginConfigurationType = OCSFCodecConfig.class)
 public class OCSFCodec implements InputCodec {
-    private final ObjectMapper objectMapper = new ObjectMapper();
+    private static final ObjectReader OBJECT_READER = new ObjectMapper().readerFor(OCSF.class);
 
     @DataPrepperPluginConstructor
     public OCSFCodec(final OCSFCodecConfig config) {
@@ -25,16 +25,7 @@ public OCSFCodec(final OCSFCodecConfig config) {
 
     @Override
     public void parse(InputStream inputStream, Consumer<Record<Event>> eventConsumer) throws IOException {
-        try (final BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
-            parseBufferedReader(reader, eventConsumer);
-        }
-    }
-
-    private void parseBufferedReader(final BufferedReader reader, final Consumer<Record<Event>> eventConsumer) throws IOException {
-        String line;
-        while ((line = reader.readLine()) != null) {
-            final OCSF ocsf = objectMapper.readValue(line, OCSF.class);
-            eventConsumer.accept(new Record<>(ocsf));
-        }
+        final MappingIterator<OCSF> mappingIterator = OBJECT_READER.readValues(inputStream);
+        mappingIterator.forEachRemaining(ocsf -> eventConsumer.accept(new Record<>(ocsf)));
     }
 }