diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e87d7e..9ad410c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,16 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
 
-# 1.0.5 - 2020-03-06
+# 1.0.6 - 2021-11-04
+## Added
+
+## Fixed
+
+## Changed
+- Upgraded docker image to debian:bullseye-slim
+
+
+# 1.0.5 - 2021-03-06
 ## Added
 - Include an optional TLS termination proxy as part of the `docker-compose`
   setup (requires setting `ZEITGITTER_DOMAIN` in addition to
@@ -20,7 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
   Docker image is affected by the modifications leading up to v1.0.5
 
 
-# 1.0.4 - 2020-03-05
+# 1.0.4 - 2021-03-05
 ## Added
 - `--upstream-sleep` allows to sleep between upstream timestamps, e.g.
   to ensure a consistent ordering of cross-timestamping events for each
diff --git a/Makefile b/Makefile
index 8695f48..c48f26e 100644
--- a/Makefile
+++ b/Makefile
@@ -145,7 +145,7 @@ QEMUDETECT = /proc/sys/fs/binfmt_misc/qemu-m68k
 # for anything else, output nothing
 BASETAG     = zeitgitter/zeitgitter
 VERSIONTAGS = $(shell sed -n -e 's,^VERSION = .\(\([0-9].[0-9]\).[0-9]\).$$,-t ${BASETAG}:\1 -t ${BASETAG}:\2,p' zeitgitter/version.py)
-# debian:buster-slim also supports
+# debian:bullseye-slim also supports
 # linux/arm64/v8,linux/mips64le,linux/ppc64le,linux/s390x. If there is demand,
 # I'll happily add them to the default build.
 PLATFORMS  = linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6
diff --git a/zeitgitter/version.py b/zeitgitter/version.py
index 29ae2fc..99eeae6 100644
--- a/zeitgitter/version.py
+++ b/zeitgitter/version.py
@@ -18,4 +18,4 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #
 
-VERSION = '1.0.5'
+VERSION = '1.0.6'