diff --git a/.tool-versions b/.tool-versions
index 347859f..c247bf0 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
-gleam 1.0.0
+gleam 1.4.1
 erlang 26.1.2
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index c2c5356..7fcb4bb 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,7 +1,8 @@
-Unreleased
+3.1.0
 -----
 
-* Added bigi.from_bytes() and bigi.to_bytes() functions.
++ Added bigi.from_bytes() and bigi.to_bytes() functions.
+  Thanks to Richard Viney.
 
 3.0.0
 -----
diff --git a/gleam.toml b/gleam.toml
index ba34ebb..451e7f6 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -1,5 +1,5 @@
 name = "bigi"
-version = "3.0.0"
+version = "3.1.0"
 
 # Fill out these fields if you intend to generate HTML documentation or publish
 # your project to the Hex package manager.