diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 18f6c5a..6050140 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -8,7 +8,7 @@ equalsverifier = "3.17.1"
 jetbrains-annotations = "25.0.0"
 junit = "5.11.1"
 jvm-dependency-conflict-resolution = "2.1.2"
-koin = "3.5.6"
+koin = "4.0.0"
 kotest = "5.9.1"
 kotlin = "2.0.20" # Must match KSP version below.
 kotlinpoet = "1.18.1"
diff --git a/subprojects/di-with-koin/src/it/kotlin/org/sdkotlin/koin/it/hello/HelloModuleIT.kt b/subprojects/di-with-koin/src/it/kotlin/org/sdkotlin/koin/it/hello/HelloModuleIT.kt
index 8ae654a..85fe75e 100644
--- a/subprojects/di-with-koin/src/it/kotlin/org/sdkotlin/koin/it/hello/HelloModuleIT.kt
+++ b/subprojects/di-with-koin/src/it/kotlin/org/sdkotlin/koin/it/hello/HelloModuleIT.kt
@@ -5,7 +5,6 @@ import org.assertj.core.api.Assertions.assertThatExceptionOfType
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.RegisterExtension
 import org.koin.core.error.InstanceCreationException
-import org.koin.core.parameter.parametersOf
 import org.koin.core.qualifier.named
 import org.koin.test.KoinTest
 import org.koin.test.get
@@ -16,8 +15,6 @@ import org.sdkotlin.koin.hello.DECLARED_COMPONENT_CONTAINER
 import org.sdkotlin.koin.hello.ExternalComponent
 import org.sdkotlin.koin.hello.ExternalComponentContainer
 import org.sdkotlin.koin.hello.HelloController
-import org.sdkotlin.koin.hello.REVERSE_INJECTED_COMPONENT
-import org.sdkotlin.koin.hello.REVERSE_INJECTED_COMPONENT_CONTAINER
 import org.sdkotlin.koin.hello.RandomGreetingService
 import org.sdkotlin.koin.hello.helloModule
 
@@ -58,35 +55,4 @@ internal class HelloModuleIT : KoinTest {
 		assertThat(externalComponentContainer.externalComponent.value)
 			.isEqualTo(TESTING)
 	}
-
-	@Test
-	fun `test reverse injecting an external component`() {
-
-		assertThatExceptionOfType(InstanceCreationException::class.java)
-			.isThrownBy {
-				get<ExternalComponentContainer>(
-					named(
-						REVERSE_INJECTED_COMPONENT_CONTAINER
-					)
-				)
-			}
-
-		// "Reverse inject" the external component into the Koin module as an
-		// injection parameter for a singleton that is the parameter itself
-		get<ExternalComponent>(named(REVERSE_INJECTED_COMPONENT)) {
-			parametersOf(ExternalComponent(TESTING))
-		}
-
-		// Get another component from Koin that depends on the external
-		// component having been injected into the module
-		val externalComponentContainer =
-			get<ExternalComponentContainer>(
-				named(
-					REVERSE_INJECTED_COMPONENT_CONTAINER
-				)
-			)
-
-		assertThat(externalComponentContainer.externalComponent.value)
-			.isEqualTo(TESTING)
-	}
 }
diff --git a/subprojects/di-with-koin/src/main/kotlin/org/sdkotlin/koin/hello/helloModule.kt b/subprojects/di-with-koin/src/main/kotlin/org/sdkotlin/koin/hello/helloModule.kt
index aebc97e..3e6f872 100644
--- a/subprojects/di-with-koin/src/main/kotlin/org/sdkotlin/koin/hello/helloModule.kt
+++ b/subprojects/di-with-koin/src/main/kotlin/org/sdkotlin/koin/hello/helloModule.kt
@@ -5,32 +5,28 @@ import org.koin.dsl.module
 
 const val DECLARED_COMPONENT = "declared component"
 const val DECLARED_COMPONENT_CONTAINER = "declared component container"
-const val REVERSE_INJECTED_COMPONENT = "reverse injected component"
-const val REVERSE_INJECTED_COMPONENT_CONTAINER = "reverse injected component container"
 
 internal val helloModule = module {
 
-	single<GreetingService> { RandomGreetingService() }
-	single<GreetingService>(named<EnglishGreetingService>()) { EnglishGreetingService() }
-
-	single<HelloController> { SimpleHelloController(get()) }
+	// An unqualified GreetingService
+	single<GreetingService> {
+		RandomGreetingService()
+	}
 
-	// Injection will fail if DECLARED_COMPONENT isn't externally declared prior, e.g. with getKoin().declare(...)
-	single(named(DECLARED_COMPONENT_CONTAINER)) {
-		ExternalComponentContainer(
-			get(named(DECLARED_COMPONENT))
-		)
+	// A named GreetingService
+	single<GreetingService>(named<EnglishGreetingService>()) {
+		EnglishGreetingService()
 	}
 
-	// A parameterized component where the parameter ends up being the component itself
-	single(named(REVERSE_INJECTED_COMPONENT)) { (externalComponent: ExternalComponent) ->
-		externalComponent
+	single<HelloController> {
+		SimpleHelloController(get())
 	}
 
-	// Injection will fail if REVERSE_INJECTED_COMPONENT isn't reverse injected prior
-	single(named(REVERSE_INJECTED_COMPONENT_CONTAINER)) {
+	// Injection will fail if DECLARED_COMPONENT isn't externally declared
+	// prior, e.g. with getKoin().declare(...)
+	single(named(DECLARED_COMPONENT_CONTAINER)) {
 		ExternalComponentContainer(
-			get(named(REVERSE_INJECTED_COMPONENT))
+			get(named(DECLARED_COMPONENT))
 		)
 	}
 }