diff --git a/DESCRIPTION b/DESCRIPTION
index 84abcc90..0c9074ac 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: bbotk
 Title: Black-Box Optimization Toolkit
-Version: 1.8.1.9000
+Version: 1.9.0
 Authors@R: c(
     person("Marc", "Becker", , "marcbecker@posteo.de", role = c("cre", "aut"),
            comment = c(ORCID = "0000-0002-8115-0400")),
diff --git a/NEWS.md b/NEWS.md
index a7ebc1f3..2fa38f2f 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,8 +1,11 @@
-# bbotk (development version)
+# bbotk 1.9.0
 
 * feat: Allow `"learn"` tag (direction=0) alongside minimize/maximize in `Codomain`.
 * feat: Add new base class `EvalInstance` from which `OptimInstance` now inherits. `EvalInstance` keeps information about a process that evaluates an `Objective` while not necessarily optimizing it.
 * feat: Exporting formerly internal `choose_search_space()` function.
+* feat: Use `mlr3misc` error classes for errors and warnings.
+* compatibility: Compatible with `rush` 1.0.0.
+* fix: Terminator print method works correctly now.
 
 # bbotk 1.8.1
 
diff --git a/R/bbotk_reflections.R b/R/bbotk_reflections.R
index 19a7651c..32f1f0e1 100644
--- a/R/bbotk_reflections.R
+++ b/R/bbotk_reflections.R
@@ -4,7 +4,7 @@
 #' @description
 #' Environment which stores various information to allow objects to examine and
 #' introspect their structure and properties
-#' (c.f. [Reflections](https://www.wikiwand.com/en/Reflection_(computer_programming))).
+#' (c.f. [Reflections](https://en.wikipedia.org/wiki/Reflective_programming)).
 #'
 #' This environment be modified by third-party packages.
 #'
diff --git a/man/bbotk_reflections.Rd b/man/bbotk_reflections.Rd
index fd12437a..51291eb7 100644
--- a/man/bbotk_reflections.Rd
+++ b/man/bbotk_reflections.Rd
@@ -13,7 +13,7 @@ bbotk_reflections
 \description{
 Environment which stores various information to allow objects to examine and
 introspect their structure and properties
-(c.f. \href{https://www.wikiwand.com/en/Reflection_(computer_programming)}{Reflections}).
+(c.f. \href{https://en.wikipedia.org/wiki/Reflective_programming}{Reflections}).
 
 This environment be modified by third-party packages.