diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c6e17c..ca50798 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [3.20.0] - 2019-12-20
+
+### Changed
+
++ Updated hydrus server version
+
 ## [3.19.0] - 2019-11-28
 
 ### Changed
@@ -295,7 +301,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 + Initial release
 
-[Unreleased]: https://github.com/mserajnik/hydrus-server-docker/compare/3.19.0...develop
+[Unreleased]: https://github.com/mserajnik/hydrus-server-docker/compare/3.20.0...develop
+[3.20.0]: https://github.com/mserajnik/hydrus-server-docker/compare/3.19.0...3.20.0
 [3.19.0]: https://github.com/mserajnik/hydrus-server-docker/compare/3.18.0...3.19.0
 [3.18.0]: https://github.com/mserajnik/hydrus-server-docker/compare/3.17.0...3.18.0
 [3.17.0]: https://github.com/mserajnik/hydrus-server-docker/compare/3.16.0...3.17.0
diff --git a/Dockerfile b/Dockerfile
index 8552d36..2976b95 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -48,7 +48,7 @@ RUN \
     psutil~=5.6.7 \
     pylzma~=0.5.0 \
     pyopenssl~=19.1.0 \
-    pyyaml~=5.1.2 \
+    pyyaml~=5.2 \
     requests~=2.22.0 \
     send2trash~=1.5.0 \
     service_identity~=18.1.0 \
diff --git a/README.md b/README.md
index 8afcab6..ba8d213 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 This is a simple Debian-based Docker setup for running
 [hydrus server][hydrus-server] from source.
 
-The latest build runs [hydrus server version 375][hydrus-server-version].
+The latest build runs [hydrus server version 378][hydrus-server-version].
 
 ## Table of contents
 
@@ -34,7 +34,7 @@ By default, this will pull the latest build. To specify an image with a
 specific version of hydrus server, provide the version number as tag, e.g.:
 
 ```zsh
-user@local:~$ docker pull mserajnik/hydrus-server-docker:375
+user@local:~$ docker pull mserajnik/hydrus-server-docker:378
 ```
 
 See [here][docker-hub-tags] for all the available version numbers/tags.
@@ -169,13 +169,13 @@ You are welcome to help out!
 [MIT](LICENSE.md) © Michael Serajnik
 
 [hydrus-server]: http://hydrusnetwork.github.io/hydrus/
-[hydrus-server-version]: https://github.com/hydrusnetwork/hydrus/releases/tag/v375
+[hydrus-server-version]: https://github.com/hydrusnetwork/hydrus/releases/tag/v378
 [docker-hub]: https://hub.docker.com/r/mserajnik/hydrus-server-docker/
 [docker-hub-tags]: https://hub.docker.com/r/mserajnik/hydrus-server-docker/tags/
 [docker]: https://www.docker.com/
 [semantic-versioning]: https://semver.org/
 
-[hydrus-server-badge]: https://img.shields.io/badge/hydrus%20server-version%20375-blue.svg
+[hydrus-server-badge]: https://img.shields.io/badge/hydrus%20server-version%20378-blue.svg
 
 [travis]: https://travis-ci.com/mserajnik/hydrus-server-docker
 [travis-badge]: https://travis-ci.com/mserajnik/hydrus-server-docker.svg
diff --git a/hydrus b/hydrus
index d184101..77326ca 160000
--- a/hydrus
+++ b/hydrus
@@ -1 +1 @@
-Subproject commit d18410121e81226d72d5b89e9562324d1c0f4607
+Subproject commit 77326caeb993ec7fb79b372550f6facd056986ff