diff --git a/reproducible-builds/Dockerfile b/reproducible-builds/Dockerfile
index 74fa45330..a2c6c1ebd 100644
--- a/reproducible-builds/Dockerfile
+++ b/reproducible-builds/Dockerfile
@@ -5,7 +5,7 @@ FROM ubuntu:jammy-20230624@sha256:b060fffe8e1561c9c3e6dea6db487b900100fc26830b9e
 # UNIX timestamp will be generated at the time of the build, and is non-deterministic.
 #
 # Read https://reproducible-builds.org/specs/source-date-epoch/ for more info
-ENV SOURCE_DATE_EPOCH=0
+ENV SOURCE_DATE_EPOCH=1
 
 # Due to some issues with NVM reading .nvmrc, we define the version
 # as an environment variable and use that instead.
diff --git a/reproducible-builds/build.sh b/reproducible-builds/build.sh
index 52527a7a6..cff8760b9 100755
--- a/reproducible-builds/build.sh
+++ b/reproducible-builds/build.sh
@@ -3,18 +3,18 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 # Usage:
-# ./build.sh [ dev (default) | public (prod and beta builds) | alpha | test | staging ] [ Build timestamp override. Defaults to latest git commit or 0. ]
+# ./build.sh [ dev (default) | public (prod and beta builds) | alpha | test | staging ] [ Build timestamp override. Defaults to latest git commit or 1. ]
 
 # First we prepare the docker container in which our build scripts will run. This container includes
 # all build dependencies at specific versions.
 # We set SOURCE_DATE_EPOCH to make system build timestamps deterministic.
-docker build -t signal-desktop --build-arg SOURCE_DATE_EPOCH=0 --build-arg NODE_VERSION=$(cat ../.nvmrc) .
+docker build -t signal-desktop --build-arg SOURCE_DATE_EPOCH=1 --build-arg NODE_VERSION=$(cat ../.nvmrc) .
 
 # Before performing the actual build, go to the project root.
 cd ..
 
 # Prepare the timestamp of the actual build based on the latest git commit.
-source_date_epoch=0
+source_date_epoch=1
 if [ "$2" != "" ]; then
   echo "Using override timestamp for SOURCE_DATE_EPOCH."
   source_date_epoch=$(($2))
@@ -25,8 +25,8 @@ else
     echo "Setting SOURCE_DATE_EPOCH to latest commit's timestamp."
     source_date_epoch=$((git_timestamp))
   else
-    echo "Can't get latest commit timestamp. Defaulting to 0."
-    source_date_epoch=0
+    echo "Can't get latest commit timestamp. Defaulting to 1."
+    source_date_epoch=1
   fi
 fi