diff --git a/.editorconfig b/.editorconfig
index 31deac5..6915df1 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -18,6 +18,11 @@ ktlint_standard_no-wildcard-imports = enabled
 # single-line `{ a; b }` blocks, and expression bodies kept on one line where they fit. ktlint still gates
 # imports, indentation, spacing, blank lines, and the 120-column limit.
 ktlint_standard_function-naming = disabled
+# ktlint 14 introduced class-signature and function-signature, which collapse a multi-line parameter
+# list onto one line whenever it fits and push the supertype onto its own line. That is the aggressive
+# wrapping this file already opted out of by choosing intellij_idea over ktlint_official, so it stays off.
+ktlint_standard_class-signature = disabled
+ktlint_standard_function-signature = disabled
 ktlint_standard_function-signature = disabled
 ktlint_standard_statement-wrapping = disabled
 ktlint_standard_if-else-bracing = disabled
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 24623f2..251262b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -7,7 +7,7 @@ serialization = "1.11.0"
 ktor = "3.5.1"
 junit = "6.1.2"
 testcontainers = "2.0.5"
-ktlint = "12.1.2"
+ktlint = "14.2.0"
 detekt = "1.23.8"
 kover = "0.9.9"
 kotest = "6.2.3"
diff --git a/kdrant-core/src/main/kotlin/dev/kdrant/internal/DefaultQdrantClient.kt b/kdrant-core/src/main/kotlin/dev/kdrant/internal/DefaultQdrantClient.kt
index 136bde3..ae80dd0 100644
--- a/kdrant-core/src/main/kotlin/dev/kdrant/internal/DefaultQdrantClient.kt
+++ b/kdrant-core/src/main/kotlin/dev/kdrant/internal/DefaultQdrantClient.kt
@@ -144,8 +144,10 @@ internal class DefaultQdrantClient(
     ) {
         val built = FilterBuilder().apply(filter).build()
         require(
-            !built.must.isNullOrEmpty() || !built.should.isNullOrEmpty() ||
-                !built.mustNot.isNullOrEmpty() || built.minShould != null,
+            !built.must.isNullOrEmpty() ||
+                !built.should.isNullOrEmpty() ||
+                !built.mustNot.isNullOrEmpty() ||
+                built.minShould != null,
         ) {
             "delete-by-filter requires at least one condition; an empty filter would match every point"
         }
diff --git a/kdrant-spring-ai/src/main/kotlin/dev/kdrant/springai/KdrantVectorStore.kt b/kdrant-spring-ai/src/main/kotlin/dev/kdrant/springai/KdrantVectorStore.kt
index 04385bf..176d68a 100644
--- a/kdrant-spring-ai/src/main/kotlin/dev/kdrant/springai/KdrantVectorStore.kt
+++ b/kdrant-spring-ai/src/main/kotlin/dev/kdrant/springai/KdrantVectorStore.kt
@@ -56,11 +56,9 @@ public class KdrantVectorStore(
         runBlocking { client.delete(collectionName, idList.map { PointId.uuid(it) }) }
     }
 
-    override fun delete(filterExpression: Filter.Expression) {
-        throw UnsupportedOperationException(
-            "kdrant-spring-ai does not yet support delete by a metadata filter expression",
-        )
-    }
+    override fun delete(filterExpression: Filter.Expression): Unit = throw UnsupportedOperationException(
+        "kdrant-spring-ai does not yet support delete by a metadata filter expression",
+    )
 
     override fun similaritySearch(request: SearchRequest): List<Document> {
         if (request.hasFilterExpression()) {