diff --git a/Project.toml b/Project.toml
index 41e777e13e..ad8b66395e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "MathOptInterface"
 uuid = "b8f27783-ece8-5eb3-8dc8-9495eed66fee"
-version = "1.20.1"
+version = "1.21.0"
 
 [deps]
 BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
@@ -28,16 +28,11 @@ DataStructures = "0.18"
 ForwardDiff = "0.5, 0.6, 0.7, 0.8, 0.9, 0.10"
 JSON = "~0.21"
 JSONSchema = "1"
-LinearAlgebra = "1.6"
 MutableArithmetics = "1"
 NaNMath = "0.3, 1"
 OrderedCollections = "1"
 PrecompileTools = "1"
-Printf = "1.6"
-SparseArrays = "1.6"
 SpecialFunctions = "0.8, 1, 2"
-Test = "1.6"
-Unicode = "1.6"
 julia = "1.6"
 
 [extras]
diff --git a/docs/src/changelog.md b/docs/src/changelog.md
index 735d4d955f..54ea5bd61d 100644
--- a/docs/src/changelog.md
+++ b/docs/src/changelog.md
@@ -7,6 +7,32 @@ CurrentModule = MathOptInterface
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## v1.21.0 (October 25, 2023)
+
+### Added
+
+ - Added [`SolutionLimit`](@ref) attribute (#2291)
+ - Added support for MathOptFormat v1.6 and v1.7 (#2293) (#2298) (#2299) (#2321)
+ - Added [`ScalarQuadraticCoefficientChange`](@ref) (#2296) (#2320) (#2322)
+ - Added [`Utilities.modify_constants`](@ref) (#2300)
+ - Added support for [`is_empty`](@ref) and [`empty!`](@ref) of
+   [`Nonlinear.Model`](@ref) (#2305)
+ - Added [`Bridges.Objective.FunctionConversionBridge`](@ref) (#2303)
+ - Added `Bridges.ModifyBridgeNotAllowed` (#2307)
+ - Added more sets for [`Utilities.distance_to_set`](@ref) (#2314)
+
+### Fixed
+
+ - Fixed `test_attribute_TimeLimitSec` (#2256)
+ - Fixed conversion cost in objective bridges (#2309)
+
+### Other
+
+ - Fixed flakey link checking in documentation (#2297)
+ - Minor documentation fixes (#2304) (#2313)
+ - Fixed `[compat]` section of `Project.toml` (#2310)
+ - Added MultiObjectiveAlgorithms to `solver-tests.yml` (#2312)
+
 ## v1.20.1 (September 24, 2023)
 
 ### Fixed