diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 00000000..6150e2e6
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,2 @@
+# Scala Steward: Reformat with scalafmt 3.9.3
+ba91ed08b8a34266f03b1061036db5644bbbcf47
diff --git a/.scalafmt.conf b/.scalafmt.conf
index 4b1d4766..bacfe013 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = 3.8.6
+version = 3.9.3
 
 align.preset = more
 assumeStandardLibraryStripMargin = true
diff --git a/core/src/main/scala/io/bullet/borer/Float16.scala b/core/src/main/scala/io/bullet/borer/Float16.scala
index abfe4387..5034949a 100644
--- a/core/src/main/scala/io/bullet/borer/Float16.scala
+++ b/core/src/main/scala/io/bullet/borer/Float16.scala
@@ -40,10 +40,10 @@ object Float16:
     else if (mant != 0) // && exp==0 -> subnormal
       exp = 0x1C400     // make it normal
       while ({
-        mant <<= 1          // mantissa * 2
-        exp -= 0x400        // decrease exp by 1
-        (mant & 0x400) == 0 // while not normal
-      }) {}
+          mant <<= 1          // mantissa * 2
+          exp -= 0x400        // decrease exp by 1
+          (mant & 0x400) == 0 // while not normal
+        }) {}
       mant &= 0x3FF // discard subnormal bit
     java.lang.Float.intBitsToFloat((hbits & 0x8000) << 16 | (exp | mant) << 13)