diff --git a/CHANGELOG.md b/CHANGELOG.md
index 025d17c..a0b8f3b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ This list is not intended to be all-encompassing - it will document major and br
 when appropriate:
 
 ### v2.13.1.0
+- **all** : Upgrade of dependencies
 - **state4k** : [New module] Simple state machine modelling
 
 ### v2.13.0.0
diff --git a/state4k/src/test/kotlin/dev/forkhandles/state4k/example.kt b/state4k/src/test/kotlin/dev/forkhandles/state4k/example.kt
index 9c5d20a..64ed5c1 100644
--- a/state4k/src/test/kotlin/dev/forkhandles/state4k/example.kt
+++ b/state4k/src/test/kotlin/dev/forkhandles/state4k/example.kt
@@ -24,23 +24,23 @@ val exampleStateMachine = StateMachine<MyState, MyEntity, MyEvent, MyCommandType
     { _, _ -> Success(Unit) },
     EntityStateLens(MyEntity::state) { entity, state -> entity.copy(state = state) },
     buildState(one)
-        .transition<OneToTwoEvent>(two, { e, o -> o.copy(data = OneToTwoEvent.data) }, firedOnTwo)
-        .transition<OneToFourEvent>(four, { e, o -> o.copy(data = OneToFourEvent.data) })
-        .transition<OneToSixEvent>(six, { e, o -> o.copy(data = OneToSixEvent.data) }, eject),
+        .transition<OneToTwoEvent>(two, { _, o -> o.copy(data = OneToTwoEvent.data) }, firedOnTwo)
+        .transition<OneToFourEvent>(four, { _, o -> o.copy(data = OneToFourEvent.data) })
+        .transition<OneToSixEvent>(six, { _, o -> o.copy(data = OneToSixEvent.data) }, eject),
     buildState(two)
         .transition<TwoToThreeEvent>(
             three,
-            { e, o -> o.copy(data = TwoToThreeEvent.data) },
+            { _, o -> o.copy(data = TwoToThreeEvent.data) },
             firedOnThree
         ),
     buildState(three)
         .transition<ThreeToFourEvent>(
             four,
-            { e, o -> o.copy(data = ThreeToFourEvent.data) },
+            { _, o -> o.copy(data = ThreeToFourEvent.data) },
             eject
         ),
     buildState(four)
-        .transition<ThreeToFourEvent>(five, { e, o -> o.copy(data = ThreeToFourEvent.data) })
+        .transition<ThreeToFourEvent>(five, { _, o -> o.copy(data = ThreeToFourEvent.data) })
 )
 
 fun buildState(start: MyState) = StateBuilder<MyState, MyEntity, MyCommandType>(start)
diff --git a/versions.properties b/versions.properties
index b9f4d26..971d722 100644
--- a/versions.properties
+++ b/versions.properties
@@ -17,15 +17,19 @@ version.com.fasterxml.jackson.core..jackson-databind=2.16.1
 
 version.com.natpryce..hamkrest=1.8.0.1
 
-version.junit.jupiter=5.10.1
+version.junit.jupiter=5.10.2
 
 version.kotest=5.6.2
+## # available=5.7.0
+## # available=5.7.1
+## # available=5.7.2
+## # available=5.8.0
 
 version.kotlin=1.9.22
 
-version.kotlinx.coroutines=1.7.3
+version.kotlinx.coroutines=1.8.0
 
-version.kotlinx.serialization=1.6.2
+version.kotlinx.serialization=1.6.3
 
 version.strikt=0.34.1