diff --git a/src/core/index.ts b/src/core/index.ts
index c007f6e..def8028 100644
--- a/src/core/index.ts
+++ b/src/core/index.ts
@@ -1,8 +1,8 @@
-export { default as Renderer } from './Renderer'
+export { default as Renderer, RendererInjectionKey } from './Renderer'
 export { default as OrthographicCamera } from './OrthographicCamera'
 export { default as PerspectiveCamera } from './PerspectiveCamera'
 export { default as Camera } from './PerspectiveCamera'
 export { default as Group } from './Group'
-export { default as Scene } from './Scene'
+export { default as Scene, SceneInjectionKey } from './Scene'
 export { default as Object3D } from './Object3D'
 export { default as Raycaster } from './Raycaster'
diff --git a/src/effects/index.ts b/src/effects/index.ts
index 584d323..096aa5b 100644
--- a/src/effects/index.ts
+++ b/src/effects/index.ts
@@ -1,4 +1,4 @@
-export { default as EffectComposer } from './EffectComposer'
+export { default as EffectComposer, ComposerInjectionKey } from './EffectComposer'
 export { default as RenderPass } from './RenderPass'
 
 export { default as BokehPass } from './BokehPass'
diff --git a/src/materials/index.ts b/src/materials/index.ts
index 80e6196..b46195c 100644
--- a/src/materials/index.ts
+++ b/src/materials/index.ts
@@ -1,3 +1,4 @@
+export { MaterialInjectionKey } from './Material'
 export { default as BasicMaterial } from './BasicMaterial'
 export { default as LambertMaterial } from './LambertMaterial'
 export { default as MatcapMaterial } from './MatcapMaterial'
diff --git a/src/meshes/index.ts b/src/meshes/index.ts
index b96d1a0..8d75503 100644
--- a/src/meshes/index.ts
+++ b/src/meshes/index.ts
@@ -1,4 +1,4 @@
-export { default as Mesh } from './Mesh'
+export { default as Mesh, MeshInjectionKey } from './Mesh'
 
 export { default as Box } from './Box'
 export { default as Circle } from './Circle'