diff --git a/Changelog b/Changelog
index 4ec3455..6015f79 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,8 @@
+Release 1.4 (2020-11-09)
+
+- Pull request #20: fix bug caused by unsafe string/bytes conversions,
+  and remove all uses of `Bytes.unsafe_of_string`
+
 Release 1.3 (2019-11-20)
 
 - Pull request #16: use Sys.word_size and Sys.int_size more consistently
diff --git a/num.opam b/num.opam
index 5f4e209..304d4fd 100644
--- a/num.opam
+++ b/num.opam
@@ -1,5 +1,5 @@
 opam-version: "2.0"
-version: "1.4~dev"
+version: "1.4"
 maintainer: "Xavier Leroy <xavier.leroy@inria.fr>"
 authors: [
   "Valérie Ménissier-Morain"