diff --git a/yoti-sdk-parent/pom.xml b/yoti-sdk-parent/pom.xml
index 784ec682..5849deca 100644
--- a/yoti-sdk-parent/pom.xml
+++ b/yoti-sdk-parent/pom.xml
@@ -101,7 +101,7 @@
     <slf4j.version>2.0.16</slf4j.version>
     <bouncy.castle.version>1.70</bouncy.castle.version>
     <jackson.version>2.16.1</jackson.version>
-    <protobuf-java.version>3.25.3</protobuf-java.version>
+    <protobuf-java.version>4.28.3</protobuf-java.version>
     <httpmime.version>4.5.14</httpmime.version>
     
     <!-- spring versions -->