diff --git a/go.mod b/go.mod
index ed258fb..e7e1d72 100644
--- a/go.mod
+++ b/go.mod
@@ -23,7 +23,7 @@ require (
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.19.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.5.0 // indirect
diff --git a/go.sum b/go.sum
index 194a89e..17a6577 100644
--- a/go.sum
+++ b/go.sum
@@ -41,6 +41,8 @@ github.com/go-playground/validator/v10 v10.17.0 h1:SmVVlfAOtlZncTxRuinDPomC2DkXJ
 github.com/go-playground/validator/v10 v10.17.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
 github.com/go-playground/validator/v10 v10.18.0 h1:BvolUXjp4zuvkZ5YN5t7ebzbhlUtPsPm2S9NAZ5nl9U=
 github.com/go-playground/validator/v10 v10.18.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
+github.com/go-playground/validator/v10 v10.19.0 h1:ol+5Fu+cSq9JD7SoSqe04GMI92cbn0+wvQ3bZ8b/AU4=
+github.com/go-playground/validator/v10 v10.19.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
 github.com/go-sql-driver/mysql v1.6.0 h1:BCTh4TKNUYmOmMUcQ3IipzF5prigylS7XXjEkfCHuOE=
 github.com/go-sql-driver/mysql v1.6.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
diff --git a/goextVersion.go b/goextVersion.go
index 632f20b..19c8700 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.396"
+const GoextVersion = "0.0.397"
 
-const GoextVersionTimestamp = "2024-02-28T14:28:48+0100"
+const GoextVersionTimestamp = "2024-03-04T12:17:10+0100"
diff --git a/wmo/collection.go b/wmo/collection.go
index b69f715..121f31d 100644
--- a/wmo/collection.go
+++ b/wmo/collection.go
@@ -38,6 +38,13 @@ type fullTypeRef struct {
 	Index          []int
 }
 
+type IColl interface {
+	Collection() *mongo.Collection
+	Name() string
+	Indexes() mongo.IndexView
+	Drop(ctx context.Context) error
+}
+
 type Coll[TData any] struct {
 	coll                *mongo.Collection                                        // internal mongo collection, access via Collection()
 	dataTypeMap         map[string]fullTypeRef                                   // list of TData fields (only if TData is not an interface)