diff --git a/files/bin/git-fix-rebase-dates b/files/bin/git-fix-rebase-dates
new file mode 100644
index 0000000..4198b19
--- /dev/null
+++ b/files/bin/git-fix-rebase-dates
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# https://til.simonwillison.net/git/git-filter-repo
+
+set -e
+
+base=$1
+
+if [[ ! -v base ]]; then
+    echo "Please provide base."
+    exit 1
+fi
+
+
+git filter-repo --commit-callback '
+    commit.committer_date = commit.author_date
+' --force --refs $base..HEAD
diff --git a/tasks/dev.yml b/tasks/dev.yml
index 8f475c9..bda177c 100644
--- a/tasks/dev.yml
+++ b/tasks/dev.yml
@@ -21,6 +21,7 @@
     - docker
     - docker-compose
     - firefox-developer-edition
+    - git-filter-repo
     - github-cli
     - hugo
     - insomnia