diff --git a/src/main/kotlin/dev/usbharu/activitystreams/CollectionOrLink.kt b/src/main/kotlin/dev/usbharu/activitystreams/CollectionOrLink.kt
index 50a0a82..168385c 100644
--- a/src/main/kotlin/dev/usbharu/activitystreams/CollectionOrLink.kt
+++ b/src/main/kotlin/dev/usbharu/activitystreams/CollectionOrLink.kt
@@ -1,3 +1,3 @@
 package dev.usbharu.activitystreams
 
-interface CollectionOrLink
\ No newline at end of file
+interface CollectionOrLink : OrLink
\ No newline at end of file
diff --git a/src/main/kotlin/dev/usbharu/activitystreams/ImageOrLink.kt b/src/main/kotlin/dev/usbharu/activitystreams/ImageOrLink.kt
index ce06ed9..6daed58 100644
--- a/src/main/kotlin/dev/usbharu/activitystreams/ImageOrLink.kt
+++ b/src/main/kotlin/dev/usbharu/activitystreams/ImageOrLink.kt
@@ -1,4 +1,3 @@
 package dev.usbharu.activitystreams
 
-interface ImageOrLink {
-}
\ No newline at end of file
+interface ImageOrLink : OrLink
\ No newline at end of file
diff --git a/src/main/kotlin/dev/usbharu/activitystreams/UriOrLink.kt b/src/main/kotlin/dev/usbharu/activitystreams/UriOrLink.kt
index 43c4522..7959d11 100644
--- a/src/main/kotlin/dev/usbharu/activitystreams/UriOrLink.kt
+++ b/src/main/kotlin/dev/usbharu/activitystreams/UriOrLink.kt
@@ -1,4 +1,3 @@
 package dev.usbharu.activitystreams
 
-interface UriOrLink {
-}
\ No newline at end of file
+interface UriOrLink : OrLink
\ No newline at end of file
diff --git a/src/main/kotlin/dev/usbharu/activitystreams/UriOrUnits.kt b/src/main/kotlin/dev/usbharu/activitystreams/UriOrUnits.kt
index fc333e1..1d88dce 100644
--- a/src/main/kotlin/dev/usbharu/activitystreams/UriOrUnits.kt
+++ b/src/main/kotlin/dev/usbharu/activitystreams/UriOrUnits.kt
@@ -1,4 +1,3 @@
 package dev.usbharu.activitystreams
 
-interface UriOrUnits {
-}
\ No newline at end of file
+interface UriOrUnits
\ No newline at end of file