diff --git a/Dockerfile b/Dockerfile
index c2f335c..04d2640 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,8 +17,8 @@
 
 ARG BASE_IMAGE_VERSION=latest
 
-ARG DATASKETCHES_CPP_HASH=8135b65408947694e13bd131038889e439847aa2
-ARG DATASKETCHES_CPP_VERSION=5.2.0
+ARG DATASKETCHES_CPP_HASH=e19d4357d938da8ce109ffbd3d47c25fc950a518
+ARG DATASKETCHES_CPP_VERSION=5.3.0
 
 FROM postgres:$BASE_IMAGE_VERSION
 
diff --git a/package.sh b/package.sh
index 7d9b7b4..406cfaf 100755
--- a/package.sh
+++ b/package.sh
@@ -32,7 +32,7 @@ if [ -z $2 ]; then
 fi
 
 # version of datasketches-cpp core library to include
-CORETAG=5.2.0
+CORETAG=5.3.0
 
 DST=datasketches-$VER