diff --git a/Dockerfile b/Dockerfile
index d3ce450..a2a66d7 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@
 # -----------------------------------------------------------------------------
 
 ARG IMAGE_BUILDER=golang:1.25.5-bookworm@sha256:d9132cce84391efab786495288756d60e1da215b1f94e87860aeefc3d4c45b6d
-ARG IMAGE_FINAL=senzing/senzingsdk-runtime:4.1.0@sha256:e57d751dc0148bb8eeafedb7accf988413f50b54a7e46f25dfe4559d240063e5
+ARG IMAGE_FINAL=senzing/senzingsdk-runtime:4.2.1@sha256:b3af3bace2ae835e1de6ac10637e0ab3a9cf26b8803d22d32f26b8da12a74bed
 
 # -----------------------------------------------------------------------------
 # Stage: senzingsdk_runtime
diff --git a/package.Dockerfile b/package.Dockerfile
index ffc1fa7..97c7548 100755
--- a/package.Dockerfile
+++ b/package.Dockerfile
@@ -2,7 +2,7 @@
 # Stages
 # -----------------------------------------------------------------------------
 
-ARG IMAGE_SENZINGSDK_RUNTIME=senzing/senzingsdk-runtime:4.1.0@sha256:e57d751dc0148bb8eeafedb7accf988413f50b54a7e46f25dfe4559d240063e5
+ARG IMAGE_SENZINGSDK_RUNTIME=senzing/senzingsdk-runtime:4.2.1@sha256:b3af3bace2ae835e1de6ac10637e0ab3a9cf26b8803d22d32f26b8da12a74bed
 ARG IMAGE_BUILDER=golang:1.25.5-bookworm@sha256:d9132cce84391efab786495288756d60e1da215b1f94e87860aeefc3d4c45b6d
 ARG IMAGE_FPM=dockter/fpm:1.1.0@sha256:a92ac598d35f1a7a4a659e26bd0e1bd25f317aafdcd4be8bf2795314c421d89b
 ARG IMAGE_FINAL=alpine@sha256:25109184c71bdad752c8312a8623239686a9a2071e8825f20acb8f2198c3f659