diff --git a/CHANGELOG.md b/CHANGELOG.md
index edcedc4..765f947 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,11 @@
-# TBD
+<!-- UPCOMING:
+
+- error when `@extend` is used across `@media` boundaries
+- more robust support for NaN in builtin functions
+
+-->
+
+# 0.12.0
 
 - complete rewrite of parsing, evaluation, and serialization steps
 - **implement the indented syntax**
@@ -45,11 +52,6 @@ a {
 - implement division of non-comparable units and feature complete support for complex units
 - support 1 arg color.hwb()
 
-UPCOMING:
-
-- error when `@extend` is used across `@media` boundaries
-- more robust support for NaN in builtin functions
-
 # 0.11.2
 
 - make `grass::Error` a `Send` type
diff --git a/Cargo.toml b/Cargo.toml
index 601361e..71cc040 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,14 +1,14 @@
 [package]
 name = "grass"
-version = "0.11.2"
-description = "A near-feature-complete Sass compiler written purely in Rust"
+version = "0.12.0"
+description = "A Sass compiler written purely in Rust"
 readme = "README.md"
 license = "MIT"
 categories = ["command-line-utilities", "web-programming"]
 keywords = ["scss", "sass", "css", "web"]
 repository = "https://github.com/connorskees/grass"
 authors = ["ConnorSkees <39542938+ConnorSkees@users.noreply.github.com>"]
-edition = "2018"
+edition = "2021"
 include = ["src", "Cargo.toml", "README.md", "CHANGELOG.md", "Cargo.lock", "LICENSE"]
 default-run = "grass"
 
@@ -34,8 +34,8 @@ rand = { version = "0.8", optional = true }
 # todo: update to use text_size::TextRange
 codemap = "0.1.3"
 wasm-bindgen = { version = "0.2.68", optional = true }
-# todo: use phf for global functions
-phf = { version = "0.11", features = ["macros"] }
+# todo: benchmark using phf for global functions
+phf = { version = "0.10.1", features = ["macros"] }
 indexmap = "1.9.0"
 # todo: do we really need interning for things?
 lasso = "0.6"
diff --git a/README.md b/README.md
index e3ef9bb..06190ec 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ npm run sass-spec -- --impl=dart-sass --command '../target/release/grass'
 
 The spec runner does not work on Windows.
 
-Using a modified version of the spec runner that ignores warnings and error spans (but does include error messages), we get the following results:
+Using a modified version of the spec runner that ignores warnings and error spans (but does include error messages), `grass` achieves the following results:
 
 ```
 2022-12-26
@@ -79,4 +79,9 @@ TOTAL: 6905
 The majority of the failing tests are purely aesthetic, relating to whitespace
 around comments in expanded mode or error messages.
 
-<!-- todo: msrv 1.41.1 -->
\ No newline at end of file
+## Versioning
+
+The minimum supported rust version (MSRV) of `grass` is `1.56.0`. An increase to the MSRV will correspond with a minor version bump. The current MSRV is not a hard minimum, but future bugfix
+versions of `grass` are not guaranteed to work on versions prior to this.
+
+`grass` currently targets `dart-sass` version `1.54.3`. An increase to this number will correspond to a either a minor or bugfix version bump, depending on the changes.