diff --git a/CHANGES.md b/CHANGES.md
index 20e3670..63854bd 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,7 @@
+v0.3.9
+======
++ fix d4 output (#237)
+
 v0.3.8
 ======
 + mosdepth is now much faster on bams/crams with a large number of contigs (#229)
diff --git a/mosdepth.nimble b/mosdepth.nimble
index 6488b41..bd322d4 100644
--- a/mosdepth.nimble
+++ b/mosdepth.nimble
@@ -1,13 +1,13 @@
 # Package
 
-version       = "0.3.8"
+version       = "0.3.9"
 author        = "Brent Pedersen"
 description   = "fast depth"
 license       = "MIT"
 
 # Dependencies
 
-requires "hts >= 0.3.22", "docopt == 0.7.1", "nim >= 1.0.0", "https://github.com/brentp/d4-nim >= 0.0.3"
+requires "hts >= 0.3.22", "docopt == 0.7.1", "nim >= 1.0.0", "https://github.com/brentp/d4-nim >= 0.0.4"
 
 bin = @["mosdepth"]
 skipDirs = @["tests"]