diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3598fa999..cea442f77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,43 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## argmin-math [Unreleased]
 
+## argmin [argmin v0.8.0] 2023-01-28
+
+### Added
+
+* Added a `full` feature which enables all features (@stefan-k)
+* Added a particle swarm optimization example using the `nalgebra` math backend (@stefan-k)
+* Added a L-BFGS example using the `nalgebra` math backend (@stefan-k)
+
+### Changed
+
+* Improved termination handling (@relf, #305)
+  - Introduced `TerminationStatus` which can either be `Terminated(TerminationReason)` or `NotTerminated`
+  - The fields of the `TerminationReason` enum were reduced to cases potentially relevant to any solver. Solver-specific cases can be handled with `SolverExit(String)`.
+  - Added new `TerminationReason::KeyboardInterrupt` and `TerminationReason::Converged`
+* Changes to KV store used to get values from the solver to observers (@stefan-k)
+  - KV store is  now typed (via `KvValue`), which means that observers can now use the actual numbers (in the past those values were only `dyn Display` and as such could only be printed)
+  - `make_kv!` renamed to `kv!`
+* Solver does not need to be `Serialize` anymore when `serde1` feature is enabled. This was an oversight reported by @relf and fixed by @stefan-k
+* Better calculation of elapsed time inside `Executor` (@TheIronBorn)
+* The check whether the target cost is reached is now based on the current best cost function value rather than the current cost function value (@relf)
+
+
+## argmin-math [argmin-math v0.3.0] 2023-01-28
+
+### Added
+
+* Added support for `nalgebra` 0.32
+
+### Changed
+
+* All math backends now implement all math related traits (apart from the `Vec` backend which does not implement `ArgminInv`). Therefore (almost) all solvers work with all backends. (@hypotrochoid, @stefan-k)
+* More primitive and complex types are now covered as well (@stefan-k)
+* Reached 100% test coverage (@stefan-k)
+* `InverseError` is not `Clone` anymore (@stefan-k)
+* Upgraded `ndarray-linalg` to version 0.16 for the `ndarray` 0.15 backend
+
+
 ## [argmin-math v0.2.1] 2022-09-09
 
 ### Added
@@ -186,9 +223,11 @@ This is a rather large release with many (breaking) changes.
 
 For older versions please see the Git history.
 
-[Unreleased]: https://github.com/argmin-rs/argmin/compare/v0.6.0...HEAD
+[Unreleased]: https://github.com/argmin-rs/argmin/compare/argmin-v0.8.0...HEAD
+[argmin v0.8.0]: https://github.com/argmin-rs/argmin/compare/argmin-v0.7.0...argmin-v0.8.0
+[argmin v0.7.0]: https://github.com/argmin-rs/argmin/compare/argmin-v0.6.0...argmin-v0.7.0
 [argmin v0.6.0]: https://github.com/argmin-rs/argmin/compare/v0.5.1...argmin-v0.6.0
-[argmin-math v0.1.0]: https://github.com/argmin-rs/argmin/compare/v0.5.1...argmin-v0.6.0
-[argmin v0.6.0]: https://github.com/argmin-rs/argmin/compare/argmin-v0.6.0...argmin-v0.7.0
-[argmin-math v0.2.0]: https://github.com/argmin-rs/argmin/compare/argmin-v0.6.0...argmin-v0.7.0
-[argmin-math v0.2.1]: https://github.com/argmin-rs/argmin/compare/argmin-v0.7.0...argmin-math-v0.2.1
+[argmin-math v0.3.0]: https://github.com/argmin-rs/argmin/compare/argmin-math-v0.2.1...argmin-math-v0.3.0
+[argmin-math v0.2.1]: https://github.com/argmin-rs/argmin/compare/argmin-math-v0.2.0...argmin-math-v0.2.1
+[argmin-math v0.2.0]: https://github.com/argmin-rs/argmin/compare/argmin-math-v0.1.0...argmin-math-v0.2.0
+[argmin-math v0.1.0]: https://github.com/argmin-rs/argmin/compare/v0.5.1...argmin-math-v0.1.0
diff --git a/README.md b/README.md
index 21e97b73e..89fad632c 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,9 @@
 </p>
 
 <p align="center">
-  <a href="http://argmin-rs.org">Website</a>
+  <a href="https://argmin-rs.org">Website</a>
   |
-  <a href="http://argmin-rs.org/book/">Book</a>
+  <a href="https://argmin-rs.org/book/">Book</a>
   |
   <a href="https://docs.rs/argmin">Docs (latest release)</a>
   |
@@ -24,12 +24,12 @@
 
 <p align="center">
 <!--
-  <a href="http://argmin-rs.org"
+  <a href="https://argmin-rs.org"
     ><img
       src="https://img.shields.io/website?down_message=offline&style=flat-square&up_message=argmin-rs.org&url=http%3A%2F%2Fargmin-rs.org"
       alt="Website"
   /></a>
-  <a href="http://argmin-rs.org/book/"
+  <a href="https://argmin-rs.org/book/"
     ><img
       src="https://img.shields.io/website?label=book&style=flat-square&url=http%3A%2F%2Fargmin-rs.org%2Fbook%2F"
       alt="Website"
diff --git a/argmin-math/Cargo.toml b/argmin-math/Cargo.toml
index 3fe177635..39c2f796e 100644
--- a/argmin-math/Cargo.toml
+++ b/argmin-math/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "argmin-math"
-version = "0.2.1"
+version = "0.3.0"
 authors = ["Stefan Kroboth <stefan.kroboth@gmail.com>"]
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "argmin math abstractions"
 documentation = "https://docs.rs/argmin-math/"
-homepage = "http://argmin-rs.org"
+homepage = "https://argmin-rs.org"
 repository = "https://github.com/argmin-rs/argmin"
 readme = "README.md"
 keywords = ["optimization", "math", "science"]
diff --git a/argmin-math/README.md b/argmin-math/README.md
index 2f1272510..80fdf95eb 100644
--- a/argmin-math/README.md
+++ b/argmin-math/README.md
@@ -9,9 +9,9 @@
 </p>
 
 <p align="center">
-  <a href="http://argmin-rs.org">Website</a>
+  <a href="https://argmin-rs.org">Website</a>
   |
-  <a href="http://argmin-rs.org/book/">Book</a>
+  <a href="https://argmin-rs.org/book/">Book</a>
   |
   <a href="https://docs.rs/argmin-math">Docs (latest release)</a>
   |
@@ -41,7 +41,7 @@
 </p>
 
 
-This create provides a abstractions for mathematical operations needed in [argmin](http://argmin-rs.org).
+This create provides a abstractions for mathematical operations needed in [argmin](https://argmin-rs.org).
 The supported math backends so far are basic `Vec`s, `ndarray` and `nalgebra`.
 Please consult the documentation for details.
 
diff --git a/argmin-math/src/lib.rs b/argmin-math/src/lib.rs
index d8b4f21e7..2bc381528 100644
--- a/argmin-math/src/lib.rs
+++ b/argmin-math/src/lib.rs
@@ -11,7 +11,7 @@
 //! argmin.
 //!
 //! For an introduction on how to use argmin, please also have a look at the
-//! [book](http://www.argmin-rs.org/book/).
+//! [book](https://www.argmin-rs.org/book/).
 //!
 //! # Usage
 //!
diff --git a/argmin/Cargo.toml b/argmin/Cargo.toml
index a75550d93..4270e6d76 100644
--- a/argmin/Cargo.toml
+++ b/argmin/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "argmin"
-version = "0.7.0"
+version = "0.8.0"
 authors = ["Stefan Kroboth <stefan.kroboth@gmail.com>"]
 edition = "2021"
 license = "MIT OR Apache-2.0"
 description = "Mathematical optimization in pure Rust"
 documentation = "https://docs.rs/argmin/"
-homepage = "http://argmin-rs.org"
+homepage = "https://argmin-rs.org"
 repository = "https://github.com/argmin-rs/argmin"
 readme = "../README.md"
 keywords = ["optimization", "math", "science"]
@@ -22,7 +22,7 @@ num-traits = { version = "0.2" }
 rand = { version = "0.8.5" }
 rand_xoshiro = { version = "0.6.0" }
 thiserror = "1.0"
-argmin-math = { path = "../argmin-math", version = "0.2", default-features = false, features = ["primitives"] }
+argmin-math = { path = "../argmin-math", version = "0.3", default-features = false, features = ["primitives"] }
 # optional
 bincode = { version = "1.3.3", optional = true }
 ctrlc = { version = "3.1.2", optional = true }
diff --git a/argmin/src/lib.rs b/argmin/src/lib.rs
index b971ae55f..bb4595ad8 100644
--- a/argmin/src/lib.rs
+++ b/argmin/src/lib.rs
@@ -26,7 +26,7 @@
 //! and Hessians is taken care of by the library.
 //!
 //! For an introduction on how to use argmin, please also have a look at the
-//! [book](http://www.argmin-rs.org/book/).
+//! [book](https://www.argmin-rs.org/book/).
 //!
 //! # Highlights
 //!
diff --git a/media/website/content/blog/version-v0.8.0.md b/media/website/content/blog/version-v0.8.0.md
new file mode 100644
index 000000000..f233d9fa4
--- /dev/null
+++ b/media/website/content/blog/version-v0.8.0.md
@@ -0,0 +1,166 @@
++++
+title = "argmin 0.8.0 and argmin-math 0.3.0 released"
+description = ""
+date = 2023-01-28T00:00:00+00:00
+updated = 2023-01-28T00:00:00+00:00
+draft = false
+template = "blog/page.html"
+
+[taxonomies]
+authors = ["Stefan Kroboth"]
+
+[extra]
++++
+
+<b>argmin</b> is a Rust library which offers a range of numerical optimization methods and a framework for 
+developing optimization algorithms. <b>argmin-math</b> is a trait-based abstraction layer for mathematical operations,
+which makes argmin compatible with various math backends such as [ndarray](https://crates.io/crates/ndarray) and
+[nalgebra](https://crates.io/crates/nalgebra) (or your own backend).
+For details about the design of argmin and its features I suggest having a look at
+[the website](https://argmin-rs.org),
+[the book](https://argmin-rs.org/book),
+[Github](https://github.com/argmin-rs/argmin),
+[crates.io](https://crates.io/crates/argmin) and
+[lib.rs](https://lib.rs/crates/argmin).
+
+This is a short summary of the changes in argmin 0.8.0 and argmin-math 0.3.0. 
+Both releases include breaking API changes; however upgrading from the previous versions should hopefully be fairly smooth.
+Don't hesitate [to get in touch](https://github.com/argmin-rs/argmin/issues) in case you run into problems during upgrading.
+
+## argmin 0.8.0
+
+#### Improved termination handling
+
+The solver state contains a `TerminationReason` enum which indicates why the solver terminated.
+The enum variants offered in previous versions of argmin were either applicable to all solvers or were solver-specific.
+[@relf](https://github.com/relf) [rightfully pointed out](https://github.com/argmin-rs/argmin/issues/305) that these variants weren't ideal:
+For instance, it included an awkward variant `NotTerminated` and a couple of variants could be summarized as `Converged`.
+Whenever a `Ctrl+C` was intercepted, the reason would be `Aborted`, which is suboptimal because a solver could also abort 
+due to other reasons.  
+In the discussion we decided to change the `TerminationReason` enum to the following:
+
+```rust
+pub enum TerminationReason {
+    /// Reached maximum number of iterations
+    MaxItersReached,
+    /// Reached target cost function value
+    TargetCostReached,
+    /// Algorithm manually interrupted with Ctrl+C
+    KeyboardInterrupt,
+    /// Converged
+    SolverConverged,
+    /// Solver exit with given reason
+    SolverExit(String),
+}
+```
+
+The first two are potential outcomes of two checks performed by the `Executor` for every solver. 
+`KeyboardInterrupt` replaces `Aborted` and is only used for `Ctrl+C`. 
+`SolverConverged` indicates a successful optimization run and `SolverExit(String)` is used for 
+cases where the solver stopped for a solver-specific reason specified by a string.
+
+The awkward `NotTerminated` was dropped and instead a new enum `TerminationStatus` is introduced:
+
+```rust
+enum TerminationStatus {
+    NotTerminated,
+    Terminated(TerminationReason)
+}
+```
+
+This enum is stored in the state instead of `TerminationReason`.
+It can be obtained from an `OptimizationResult` via the solver state:
+
+```rust
+// of type &TerminationStatus
+let status = result.state().get_termination_status();
+
+// ... or ...
+
+// of type Option<&TerminationReason>
+let reason = result.state().get_termination_reason();
+```
+
+Both methods are part of the `State` trait and as such available for all available states.
+
+Note that this is a breaking change and as such you may have to adapt your code, in particular if you use the returned 
+termination reason.
+
+Huge thanks to [@relf](https://github.com/relf) for the fruitful discussion and for doing all the heavy lifting!
+
+
+#### Changes to the observer interface
+
+In the past, values sent to the observers were only `dyn Display`, which means they could effectively only be turned into strings.
+To get the actual value one had to parse the strings into a given type, which isn't great (to put it mildly).
+
+Therefore I decided [to make the values sent to the observers typed](https://github.com/argmin-rs/argmin/pull/269) and
+added support for 64bit floats, signed and unsigned 64bit integer, Booleans and Strings via the `KvValue` enum:
+
+```rust
+pub enum KvValue {
+    Float(f64),
+    Int(i64),
+    Uint(u64),
+    Bool(bool),
+    Str(String),
+}
+```
+
+The actual values can be retrieved via the getters `get_float`, `get_int`, `get_uint`, `get_bool` and `get_string`,
+which return `Some(<inner_value>)` if the `KvValue` is of the appropriate type and `None` otherwise.
+
+The `make_kv!` macro used in solvers to construct the Key-Value store was renamed to `kv!`.
+
+These changes will only affect you if you wrote an observer or solver yourself.
+All observers shipped with argmin should continue to work as before.
+
+#### Other
+
+* Implementing the `Solver` trait for a solver does not require anymore that the solver implements `serde::Serialize` when the `serde1` feature is enabled.
+This was a remnant of an earlier design of the `Solver` trait found by [@relf](https://github.com/relf).
+Note that checkpointing requires solvers to be serializable!
+Therefore, despite lifting this requirement, it is still recommended that solvers are (de)serializable if possible.
+* The check whether an optional target cost is reached is now based on the best cost function value so far rather than the current cost function value ([@relf](https://github.com/relf))
+* Added a `full` feature which activates all features.
+* Added a particle swarm optimization and L-BFGS example using the nalgebra backend.
+* Elapsed time is now computed using `as_secs_f64` ([@TheIronBorn](https://github.com/TheIronBorn))
+* Internally uses argmin-math 0.3.0, so make sure to update both!
+
+## argmin-math 0.3.0
+
+With this release all backends finally implement all math-related traits, meaning that every backend now works with every solver.
+The only exception to this is the `vec` backend, which does not implement `ArgminInv` and as such does not
+work with (Gauss-)Newton methods. 
+I've spent multiple days tediously implementing all missing traits and adding tests for every implementation 
+(eventually reaching 100% test coverage). 
+[@hypotrochoid](https://github.com/hypotrochoid) implemented the `ArgminRandom` trait for the ndarray backend
+and with that kicked off this entire endeavour. Thanks!
+
+Apart from that support for nalgebra 0.32 was added and ndarray-linalg was updated from version 0.14 to 0.16 for 
+the ndarray v0.15 backend.
+Therefore you may have to update ndarray-linalg as well.
+
+Upgrading to version 0.3.0 of argmin-math should be smooth for most cases.
+
+## Other news
+
+argmin is not only a collection of optimization algorithms but also aims to be a framework which facilitates 
+the development of optimization algorithms.
+Solvers implemented using argmin get features such as checkpointing, observers and support for various math backends for free.
+
+However, I have not seen any use of this feature outside of argmin itself up until recently, when [@relf](https://github.com/relf)
+made his [egobox-ego solver](https://crates.io/crates/egobox-ego)
+[compatible with argmin](https://github.com/relf/egobox/pull/67).
+This is very exciting for me as this led to valuable feedback on the design of argmin and I hope that others will follow
+that example and make their solvers compatible with argmin.
+
+
+<br>
+<script async defer src="https://buttons.github.io/buttons.js"></script>
+<p align="center">
+<a class="github-button" href="https://github.com/argmin-rs/argmin" data-icon="octicon-star" data-size="large" data-show-count="true" aria-label="Star argmin-rs/argmin on GitHub">Star</a>
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+</p>