diff --git a/CHANGES.md b/CHANGES.md
index db90e9c..3ae3015 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,7 +2,11 @@
 
 ## 2.1.0
 
-* Update base image to dockstore-cgpwxs:3.1.4
+* Update base image to dockstore-cgpwxs:3.1.6 (from 3.0.3)
+  * Includes, memory footprint reduction for Caveman flagging
+  * Significant speedup in inde input generation
+  * Parallel flagging for SNV
+  * Fragment based SNV/Indel calling
 * Upgrade allele counter and brass
 * Reduce number of layers in final image.
 * Remove some legacy env vars from wrappers
diff --git a/Dockerfile b/Dockerfile
index ee0ce23..841d807 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM  quay.io/wtsicgp/dockstore-cgpwxs:3.1.5 as builder
+FROM  quay.io/wtsicgp/dockstore-cgpwxs:3.1.6 as builder
 
 USER  root