diff --git a/CHANGELOG.md b/CHANGELOG.md
index af695dc..7ec6242 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file. See [commit-and-tag-version](https://github.com/absolute-version/commit-and-tag-version) for commit guidelines.
 
+## 0.69.1 (2024-09-19)
+
+### Bug Fixes
+
+* Use digest to ensure deterministic environment for build system
+
+
 ## 0.69.0 (2024-09-15)
 
 
diff --git a/images/build-debian/Dockerfile b/images/build-debian/Dockerfile
index 4b61581..f555d5d 100644
--- a/images/build-debian/Dockerfile
+++ b/images/build-debian/Dockerfile
@@ -12,7 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-ARG BASE_IMAGE=ubuntu:focal-20240530
+# Use fixed manifest digest to ensure reproducible.
+# https://hub.docker.com/layers/library/ubuntu/focal-20240530/images/sha256-85c08a37b74bc18a7b3f8cf89aabdfac51c525cdbc193a753f7907965e310ec2
+# ubuntu v20.04, focal-20240530
+ARG BASE_IMAGE=ubuntu@sha256:fa17826afb526a9fc7250e0fbcbfd18d03fe7a54849472f86879d8bf562c629e
 
 # ignore this hadolint error as BASE_IMAGE contains an image tag
 # hadolint ignore=DL3006
diff --git a/tests/data/hashes/build-debian b/tests/data/hashes/build-debian
index b0a607d..efa6b9b 100644
--- a/tests/data/hashes/build-debian
+++ b/tests/data/hashes/build-debian
@@ -1 +1 @@
-83fab12505490f9ed41e5d8747f3c8844f6aee8740ad05c47eca61fd7b42a8d1
+dde868d8a135afbb54377acc6c4f8c6ec13978ed86d0a8930e129194c01912f5
diff --git a/version.txt b/version.txt
index acdcb83..f3e3a7d 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.69.0
\ No newline at end of file
+0.69.1
\ No newline at end of file