diff --git a/README.md b/README.md
index 1604b2b..1089dab 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,15 @@ The conversions supported cover the following cases.
 
 ## What’s new
 
+### Version 1.1.0 news (unreleased)
+
+  * The new experimental feature [`num-traits`][feat-nt-1-1] was
+    added, and relevant traits were added as supertraits to the
+    [`FixedOptionalFeatures`][fof-1-1] trait.
+
+[feat-nt-1-1]: https://tspiteri.gitlab.io/fixed/dev/fixed/#experimental-optional-features
+[fof-1-1]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.FixedOptionalFeatures.html
+
 ### Version 1.0.0 news (2020-06-04)
 
   * The crate now requires rustc version 1.44.0 or later.
diff --git a/RELEASES.md b/RELEASES.md
index c7db480..e463f9f 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -5,6 +5,16 @@ modification, are permitted in any medium without royalty provided the
 copyright notice and this notice are preserved. This file is offered
 as-is, without any warranty. -->
 
+Version 1.1.0 (unreleased)
+==========================
+
+  * The new experimental feature [`num-traits`][feat-nt-1-1] was
+    added, and relevant traits were added as supertraits to the
+    [`FixedOptionalFeatures`][fof-1-1] trait.
+
+[feat-nt-1-1]: https://tspiteri.gitlab.io/fixed/dev/fixed/#experimental-optional-features
+[fof-1-1]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.FixedOptionalFeatures.html
+
 Version 1.0.0 (2020-06-04)
 ==========================