diff --git a/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.java b/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.java
deleted file mode 100644
index 52f722424..000000000
--- a/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package dev.slimevr.bridge;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-
-
-@Retention(value = RetentionPolicy.SOURCE)
-public @interface BridgeThread {
-}
diff --git a/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.kt b/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.kt
new file mode 100644
index 000000000..13554b243
--- /dev/null
+++ b/server/core/src/main/java/dev/slimevr/bridge/BridgeThread.kt
@@ -0,0 +1,4 @@
+package dev.slimevr.bridge
+
+@Retention(AnnotationRetention.SOURCE)
+annotation class BridgeThread
diff --git a/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.java b/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.java
deleted file mode 100644
index 37d6d7180..000000000
--- a/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package dev.slimevr.util.ann;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-
-
-@Retention(value = RetentionPolicy.SOURCE)
-public @interface VRServerThread {
-
-}
diff --git a/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.kt b/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.kt
new file mode 100644
index 000000000..1be5f8c14
--- /dev/null
+++ b/server/core/src/main/java/dev/slimevr/util/ann/VRServerThread.kt
@@ -0,0 +1,4 @@
+package dev.slimevr.util.ann
+
+@Retention(AnnotationRetention.SOURCE)
+annotation class VRServerThread