diff --git a/buildSrc/src/main/kotlin/PklFormatterSpotless.kt b/buildSrc/src/main/kotlin/PklFormatterSpotless.kt
index 7282d233..852aefb5 100644
--- a/buildSrc/src/main/kotlin/PklFormatterSpotless.kt
+++ b/buildSrc/src/main/kotlin/PklFormatterSpotless.kt
@@ -60,7 +60,7 @@ class PklFormatterFunc(@Transient private val configuration: Configuration) :
   private val formatterInstance by lazy { formatterClass.getConstructor().newInstance() }
 
   override fun apply(input: String): String {
-    val latestGrammarVersion = grammarVersionLatestMethod(grammarVersionClass)
+    val latestGrammarVersion = grammarVersionLatestMethod(null)
     return formatMethod(formatterInstance, input, latestGrammarVersion) as String
   }
 }
diff --git a/pkl-formatter/src/main/kotlin/org/pkl/formatter/Formatter.kt b/pkl-formatter/src/main/kotlin/org/pkl/formatter/Formatter.kt
index 44159c15..9daa1c67 100644
--- a/pkl-formatter/src/main/kotlin/org/pkl/formatter/Formatter.kt
+++ b/pkl-formatter/src/main/kotlin/org/pkl/formatter/Formatter.kt
@@ -60,6 +60,7 @@ enum class GrammarVersion(val version: Int, val versionSpan: String) {
   V2(2, "0.30+");
 
   companion object {
+    @JvmStatic
     fun latest(): GrammarVersion = entries.maxBy { it.version }
   }
 }