diff --git a/compiler-utils/src/main/kotlin/com/r0adkll/kimchi/util/ksp/ClassDeclarations.kt b/compiler-utils/src/main/kotlin/com/r0adkll/kimchi/util/ksp/ClassDeclarations.kt
index 7281387..0b360e9 100644
--- a/compiler-utils/src/main/kotlin/com/r0adkll/kimchi/util/ksp/ClassDeclarations.kt
+++ b/compiler-utils/src/main/kotlin/com/r0adkll/kimchi/util/ksp/ClassDeclarations.kt
@@ -6,7 +6,7 @@ import com.google.devtools.ksp.getAllSuperTypes
 import com.google.devtools.ksp.symbol.KSClassDeclaration
 import com.google.devtools.ksp.symbol.KSName
 import com.squareup.kotlinpoet.ClassName
-import com.squareup.kotlinpoet.ksp.toClassName
+import com.squareup.kotlinpoet.ksp.toTypeName
 
 /**
  * Return whether or not this [KSClassDeclaration] has a supertype of type [clazz] anywhere
@@ -14,7 +14,7 @@ import com.squareup.kotlinpoet.ksp.toClassName
  */
 public fun KSClassDeclaration.implements(className: ClassName): Boolean {
   return getAllSuperTypes().any {
-    it.toClassName() == className
+    it.toTypeName() == className
   }
 }
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 72ddb4c..27246dd 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -9,7 +9,7 @@ junit5 = "5.11.3"
 kotlin = "2.0.21"
 kotlin-compile-testing = "0.5.1"
 kotlin-inject = "0.7.2"
-kotlinpoet = "1.18.1"
+kotlinpoet = "2.0.0"
 ksp = "2.0.21-1.0.27"
 ksp-autoservce = "1.2.0"
 ktlint = "0.49.1"