diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89a398145..99a90bd9e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,8 +3,6 @@
 ## Unreleased
 
 ### Added
-- Convenient matrix builders for rows, columns, vstacks and hstacks
-- Sparse matrix builder
 
 ### Changed
 
@@ -13,10 +11,20 @@
 ### Removed
 
 ### Fixed
-- Ojalgo conversion bug which made all converted matrices be zero.
 
 ### Security
 
+## 0.4.2 - 2025-01-27
+
+### Added
+
+- Convenient matrix builders for rows, columns, vstacks and hstacks
+- Sparse matrix builder
+
+### Fixed
+
+- Ojalgo conversion bug which made all converted matrices be zero.
+
 ## 0.4.1 - 2025-01-12
 
 ### Added
diff --git a/benchmarks/README.md b/benchmarks/README.md
index d47192056..4ac0113b1 100644
--- a/benchmarks/README.md
+++ b/benchmarks/README.md
@@ -1,5 +1,5 @@
 # BenchmarksResult
 
-
+> **Can't find appropriate benchmark data. Try generating readme files after running benchmarks**.
 
 
diff --git a/kmath-ast/README.md b/kmath-ast/README.md
index 11b3f642a..786625412 100644
--- a/kmath-ast/README.md
+++ b/kmath-ast/README.md
@@ -10,7 +10,7 @@ Extensions to MST API: transformations, dynamic compilation and visualization.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-ast:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-ast:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-ast:0.4.1")
+    implementation("space.kscience:kmath-ast:0.4.2")
 }
 ```
 
diff --git a/kmath-commons/README.md b/kmath-commons/README.md
index 515f892e4..56e9f046a 100644
--- a/kmath-commons/README.md
+++ b/kmath-commons/README.md
@@ -6,7 +6,7 @@ Commons math binding for kmath
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-commons:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-commons:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-commons:0.4.1")
+    implementation("space.kscience:kmath-commons:0.4.2")
 }
 ```
diff --git a/kmath-complex/README.md b/kmath-complex/README.md
index e230eb682..c119d3250 100644
--- a/kmath-complex/README.md
+++ b/kmath-complex/README.md
@@ -8,7 +8,7 @@ Complex and hypercomplex number systems in KMath.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-complex:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-complex:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -18,6 +18,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-complex:0.4.1")
+    implementation("space.kscience:kmath-complex:0.4.2")
 }
 ```
diff --git a/kmath-core/README.md b/kmath-core/README.md
index b3e8e48ae..8a26cceaa 100644
--- a/kmath-core/README.md
+++ b/kmath-core/README.md
@@ -14,7 +14,7 @@ The core interfaces of KMath.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-core:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-core:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -24,6 +24,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-core:0.4.1")
+    implementation("space.kscience:kmath-core:0.4.2")
 }
 ```
diff --git a/kmath-coroutines/README.md b/kmath-coroutines/README.md
index 4f2540d98..07b57e569 100644
--- a/kmath-coroutines/README.md
+++ b/kmath-coroutines/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-coroutines:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-coroutines:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-coroutines:0.4.1")
+    implementation("space.kscience:kmath-coroutines:0.4.2")
 }
 ```
diff --git a/kmath-dimensions/README.md b/kmath-dimensions/README.md
index fce729828..e1250bb30 100644
--- a/kmath-dimensions/README.md
+++ b/kmath-dimensions/README.md
@@ -6,7 +6,7 @@ A proof of concept module for adding type-safe dimensions to structures
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-dimensions:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-dimensions:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-dimensions:0.4.1")
+    implementation("space.kscience:kmath-dimensions:0.4.2")
 }
 ```
diff --git a/kmath-ejml/README.md b/kmath-ejml/README.md
index 68cde77d7..746caad5b 100644
--- a/kmath-ejml/README.md
+++ b/kmath-ejml/README.md
@@ -9,7 +9,7 @@ EJML based linear algebra implementation.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-ejml:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-ejml:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -19,6 +19,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-ejml:0.4.1")
+    implementation("space.kscience:kmath-ejml:0.4.2")
 }
 ```
diff --git a/kmath-for-real/README.md b/kmath-for-real/README.md
index 666ef4f9d..857c06838 100644
--- a/kmath-for-real/README.md
+++ b/kmath-for-real/README.md
@@ -9,7 +9,7 @@ Specialization of KMath APIs for Double numbers.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-for-real:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-for-real:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -19,6 +19,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-for-real:0.4.1")
+    implementation("space.kscience:kmath-for-real:0.4.2")
 }
 ```
diff --git a/kmath-functions/README.md b/kmath-functions/README.md
index 7108782c2..1ee9c0bd5 100644
--- a/kmath-functions/README.md
+++ b/kmath-functions/README.md
@@ -11,7 +11,7 @@ Functions and interpolations.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-functions:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-functions:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -21,6 +21,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-functions:0.4.1")
+    implementation("space.kscience:kmath-functions:0.4.2")
 }
 ```
diff --git a/kmath-geometry/README.md b/kmath-geometry/README.md
index 596491e23..cac54acfd 100644
--- a/kmath-geometry/README.md
+++ b/kmath-geometry/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-geometry:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-geometry:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-geometry:0.4.1")
+    implementation("space.kscience:kmath-geometry:0.4.2")
 }
 ```
diff --git a/kmath-histograms/README.md b/kmath-histograms/README.md
index 3bcafd31c..ab2ce7631 100644
--- a/kmath-histograms/README.md
+++ b/kmath-histograms/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-histograms:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-histograms:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-histograms:0.4.1")
+    implementation("space.kscience:kmath-histograms:0.4.2")
 }
 ```
diff --git a/kmath-jupyter/README.md b/kmath-jupyter/README.md
index f1854fa40..f6d289361 100644
--- a/kmath-jupyter/README.md
+++ b/kmath-jupyter/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-jupyter:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-jupyter:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-jupyter:0.4.1")
+    implementation("space.kscience:kmath-jupyter:0.4.2")
 }
 ```
diff --git a/kmath-kotlingrad/README.md b/kmath-kotlingrad/README.md
index ed806c452..e5696b9d7 100644
--- a/kmath-kotlingrad/README.md
+++ b/kmath-kotlingrad/README.md
@@ -8,7 +8,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-kotlingrad:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-kotlingrad:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -18,6 +18,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-kotlingrad:0.4.1")
+    implementation("space.kscience:kmath-kotlingrad:0.4.2")
 }
 ```
diff --git a/kmath-memory/README.md b/kmath-memory/README.md
index b8bf5affb..ee5b9d7ad 100644
--- a/kmath-memory/README.md
+++ b/kmath-memory/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-memory:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-memory:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-memory:0.4.1")
+    implementation("space.kscience:kmath-memory:0.4.2")
 }
 ```
diff --git a/kmath-multik/README.md b/kmath-multik/README.md
index 1273c5438..03bc161b7 100644
--- a/kmath-multik/README.md
+++ b/kmath-multik/README.md
@@ -6,7 +6,7 @@ JetBrains Multik connector
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-multik:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-multik:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-multik:0.4.1")
+    implementation("space.kscience:kmath-multik:0.4.2")
 }
 ```
diff --git a/kmath-nd4j/README.md b/kmath-nd4j/README.md
index 4bd4fb275..0a1456e5a 100644
--- a/kmath-nd4j/README.md
+++ b/kmath-nd4j/README.md
@@ -9,7 +9,7 @@ ND4J based implementations of KMath abstractions.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-nd4j:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-nd4j:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -19,7 +19,7 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-nd4j:0.4.1")
+    implementation("space.kscience:kmath-nd4j:0.4.2")
 }
 ```
 
diff --git a/kmath-ojalgo/README.md b/kmath-ojalgo/README.md
index 8897f2499..4c3cfb58e 100644
--- a/kmath-ojalgo/README.md
+++ b/kmath-ojalgo/README.md
@@ -6,7 +6,7 @@ Ojalgo bindings for kmath
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-ojalgo:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-ojalgo:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-ojalgo:0.4.1")
+    implementation("space.kscience:kmath-ojalgo:0.4.2")
 }
 ```
diff --git a/kmath-optimization/README.md b/kmath-optimization/README.md
index 2a42c4353..7bf174688 100644
--- a/kmath-optimization/README.md
+++ b/kmath-optimization/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-optimization:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-optimization:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-optimization:0.4.1")
+    implementation("space.kscience:kmath-optimization:0.4.2")
 }
 ```
diff --git a/kmath-stat/README.md b/kmath-stat/README.md
index bb0549970..e768b3245 100644
--- a/kmath-stat/README.md
+++ b/kmath-stat/README.md
@@ -6,7 +6,7 @@
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-stat:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-stat:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-stat:0.4.1")
+    implementation("space.kscience:kmath-stat:0.4.2")
 }
 ```
diff --git a/kmath-symja/README.md b/kmath-symja/README.md
index 782fdab02..f4b61edb6 100644
--- a/kmath-symja/README.md
+++ b/kmath-symja/README.md
@@ -6,7 +6,7 @@ Symja integration module
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-symja:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-symja:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-symja:0.4.1")
+    implementation("space.kscience:kmath-symja:0.4.2")
 }
 ```
diff --git a/kmath-tensorflow/README.md b/kmath-tensorflow/README.md
index 7a644c4a9..42200352f 100644
--- a/kmath-tensorflow/README.md
+++ b/kmath-tensorflow/README.md
@@ -6,7 +6,7 @@ Google tensorflow connector
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-tensorflow:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-tensorflow:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-tensorflow:0.4.1")
+    implementation("space.kscience:kmath-tensorflow:0.4.2")
 }
 ```
diff --git a/kmath-tensors/README.md b/kmath-tensors/README.md
index 585a4c28e..2c32616cf 100644
--- a/kmath-tensors/README.md
+++ b/kmath-tensors/README.md
@@ -9,7 +9,7 @@ Common linear algebra operations on tensors.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-tensors:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-tensors:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -19,6 +19,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-tensors:0.4.1")
+    implementation("space.kscience:kmath-tensors:0.4.2")
 }
 ```
diff --git a/kmath-viktor/README.md b/kmath-viktor/README.md
index 98b5b7b55..e6cad4f41 100644
--- a/kmath-viktor/README.md
+++ b/kmath-viktor/README.md
@@ -6,7 +6,7 @@ Binding for https://github.com/JetBrains-Research/viktor
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-viktor:0.4.1`.
+The Maven coordinates of this project are `space.kscience:kmath-viktor:0.4.2`.
 
 **Gradle Kotlin DSL:**
 ```kotlin
@@ -16,6 +16,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-viktor:0.4.1")
+    implementation("space.kscience:kmath-viktor:0.4.2")
 }
 ```