diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca29220..95567a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 For maximum stablity, use images with tags like `ekidd/rust-musl-builder:1.46.0` or `ekidd/rust-musl-builder:nightly-2020-08-26`. These may occasionally be rebuilt, but only while they're "current", or possibly if they're recent and serious security are discovered in a library.
 
+## 2021-02-13
+
+### Changed
+
+- mdbook: Updated to 0.4.6.
+- Postgres: Updated to 11.11.
+
 ## 2021-01-07
 
 ### Fixed
diff --git a/Dockerfile b/Dockerfile
index f70277f..6d51dc9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,11 +22,11 @@ ARG OPENSSL_VERSION=1.1.1i
 #
 # We're stuck on PostgreSQL 11 until we figure out
 # https://github.com/emk/rust-musl-builder/issues.
-ARG MDBOOK_VERSION=0.4.5
+ARG MDBOOK_VERSION=0.4.6
 ARG CARGO_ABOUT_VERSION=0.2.3
 ARG CARGO_DENY_VERSION=0.8.5
 ARG ZLIB_VERSION=1.2.11
-ARG POSTGRESQL_VERSION=11.9
+ARG POSTGRESQL_VERSION=11.11
 
 # Make sure we have basic dev tools for building C libraries.  Our goal here is
 # to support the musl-libc builds and Cargo builds needed for a large selection