diff --git a/pom.xml b/pom.xml
index 0f926433..232bb2b9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -121,7 +121,7 @@
     <hikari.version>6.3.0</hikari.version>
     <fastutil.version>8.5.14</fastutil.version>
     <h2.version>2.3.232</h2.version>
-    <jackson.version>2.18.3</jackson.version>
+    <jackson.version>2.19.0</jackson.version>
     <javassist.version>3.30.2-GA</javassist.version>
     <javassist.maven.core.version>0.2.9</javassist.maven.core.version>
     <javax.persistence.version>1.0.2</javax.persistence.version>
diff --git a/src/main/java/com/arpnetworking/configuration/jackson/JsonNodeMergingSource.java b/src/main/java/com/arpnetworking/configuration/jackson/JsonNodeMergingSource.java
index d70982b1..b80ef551 100644
--- a/src/main/java/com/arpnetworking/configuration/jackson/JsonNodeMergingSource.java
+++ b/src/main/java/com/arpnetworking/configuration/jackson/JsonNodeMergingSource.java
@@ -24,9 +24,7 @@
 import com.google.common.collect.Lists;
 import net.sf.oval.constraint.NotNull;
 
-import java.util.Iterator;
 import java.util.List;
-import java.util.Map;
 import java.util.Optional;
 
 /**
@@ -75,9 +73,7 @@ private static JsonNode merge(final JsonNode target, final JsonNode source) {
             // the target node. Any unmatched fields from the source node are
             // simply added to the target node; this requires a deep copy
             // since subsequent merges may modify it.
-            final Iterator<Map.Entry<String, JsonNode>> iterator = source.fields();
-            while (iterator.hasNext()) {
-                final Map.Entry<String, JsonNode> sourceFieldEntry = iterator.next();
+            for (var sourceFieldEntry : source.properties()) {
                 final JsonNode targetFieldValue = target.get(sourceFieldEntry.getKey());
                 if (targetFieldValue != null) {
                     // Recursively merge the source field value into the target