diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 85ee6d7..38c79d7 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,2 +1,5 @@
 # Scala Steward: Reformat with scalafmt 3.8.1
 499baded20f959dca86ad7a24d2244b7241de8c3
+
+# Scala Steward: Reformat with scalafmt 3.8.4
+55455e7170d23ea63a901f7e9511a934f16d4767