diff --git a/Dockerfile b/Dockerfile
index 6ceb9e8..9f9a232 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM gradle:6.6-jdk11 AS build
 COPY ./ .
 RUN gradle --no-daemon clean dockerPrepare
 
-FROM ghcr.io/th2-net/th2-codec-sailfish:3.12.2
+FROM ghcr.io/th2-net/th2-codec-sailfish:4.0.0-th2-3987-dictionaries-custom-config-2789587670
 ARG project_name
 WORKDIR /home
 RUN echo "/home/gradle/${project_name}/build/docker"
diff --git a/README.md b/README.md
index 997587b..910aac3 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# General codecs (3.10.3)
+# General codecs (4.0.0)
 
 This repository contains the build scripts for general codecs:
 + [fix](codec-fix/README.md)
@@ -14,6 +14,10 @@ _Do not specify default parameters if you don't want to override them_ (just bec
 
 # Changes
 
+### 4.0.0
+
++ `th2-codec-sailfish` version with books/pages
+
 ### 3.10.3
 
 + Correct validation for FIX protocol (did throw an NPE in case there was no MsgType field)
diff --git a/gradle.properties b/gradle.properties
index f8ab103..510fd06 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
-release_version=3.10.3
+release_version=4.0.0
 sf_service_name = unknown-service
 docker_image_name = th2-codec-generic
\ No newline at end of file