diff --git a/Project.toml b/Project.toml
index ca2a254406..ebb1411d9d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "MathOptInterface"
 uuid = "b8f27783-ece8-5eb3-8dc8-9495eed66fee"
-version = "1.53.0"
+version = "1.53.1"
 
 [deps]
 CodecBzip2 = "523fee87-0ab8-5b00-afb7-3ecf72e48cfd"
diff --git a/docs/src/changelog.md b/docs/src/changelog.md
index 397e74d320..be8ebdb5d1 100644
--- a/docs/src/changelog.md
+++ b/docs/src/changelog.md
@@ -7,6 +7,35 @@ 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).
 
+## v1.53.1 (September 9, 2026)
+
+### Fixed
+
+- Lowered the conversion cost for [`VariableIndex`](@ref) to [`ScalarAffineFunction`](@ref)
+  in `Bridges.Constraint.FunctionConversionBridge` to `0.5`. This should reduce
+  the complexity of some conic reformulations (#3063)
+- Fixed tests of infeasible problems to also return `INFEASIBLE_OR_UNBOUNDED`
+  (#3066)
+- Fixed bugs in various bridges to do with non-zero function constants. These
+  typically affected [`ConstraintPrimal`](@ref) and
+  [`ConstraintPrimalStart`](@ref) (#3069)
+- Fixed a bug in the LP writer when there are functions with no terms (#3070)
+- Fixed the derivative of `atan(y, x)` in `Nonlinear.SymbolicAD` (#3071)
+- Fixed the Hessian computation for `min` and `max` operators (#3072)
+- Fixed modifying [`Bridges.Constraint.SplitIntervalBridge`](@ref) when the
+  set was `Interval(-Inf, Inf)` (#3073)
+- Fixed [`Bridges.Constraint.SplitHyperRectangleBridge`](@ref) when some rows
+  have bounds `(-Inf, Inf)` (#3075)
+- Fixed getting and setting [`ConstraintPrimalStart`](@ref) in scalar
+  constraints when there are bridged variables (#3076)
+- Fixed a bug deleting variables and constraints in
+  [`Utilities.MockOptimizer`](@ref) (#3080)
+
+### Other
+
+- Fixed formatting indent of multi-line strings in `test/` (#3064)
+- Fixed minor typos in the documentation (#3079)
+
 ## v1.53.0 (August 24, 2026)
 
 ### Added