diff --git a/examples/interfaces/custom-and-generic/src/lib.rs b/examples/interfaces/custom-and-generic/src/lib.rs
index fb209557..f80e16e4 100644
--- a/examples/interfaces/custom-and-generic/src/lib.rs
+++ b/examples/interfaces/custom-and-generic/src/lib.rs
@@ -105,18 +105,21 @@ mod tests {
 
         let querier = sylvia::types::BoundQuerier::<
             _,
-            std::marker::PhantomData<(
-                Empty,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-            )>,
+            &dyn super::CustomAndGeneric<
+                RetT = SvCustomMsg,
+                Exec1T = SvCustomMsg,
+                Exec2T = SvCustomMsg,
+                Exec3T = SvCustomMsg,
+                Query1T = SvCustomMsg,
+                Query2T = SvCustomMsg,
+                Query3T = SvCustomMsg,
+                Sudo1T = SvCustomMsg,
+                Sudo2T = SvCustomMsg,
+                Sudo3T = SvCustomMsg,
+                Error = (),
+                ExecC = (),
+                QueryC = (),
+            >,
         >::borrowed(&contract, &querier_wrapper);
 
         let _: Result<SvCustomMsg, _> =
diff --git a/examples/interfaces/generic/src/lib.rs b/examples/interfaces/generic/src/lib.rs
index 95aeebd4..9624672d 100644
--- a/examples/interfaces/generic/src/lib.rs
+++ b/examples/interfaces/generic/src/lib.rs
@@ -102,18 +102,19 @@ mod tests {
 
         let querier = sylvia::types::BoundQuerier::<
             Empty,
-            std::marker::PhantomData<(
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-                SvCustomMsg,
-            )>,
+            &dyn super::Generic<
+                Exec1T = SvCustomMsg,
+                Exec2T = SvCustomMsg,
+                Exec3T = SvCustomMsg,
+                Query1T = SvCustomMsg,
+                Query2T = SvCustomMsg,
+                Query3T = SvCustomMsg,
+                Sudo1T = SvCustomMsg,
+                Sudo2T = SvCustomMsg,
+                Sudo3T = SvCustomMsg,
+                RetT = SvCustomMsg,
+                Error = (),
+            >,
         >::borrowed(&contract, &querier_wrapper);
         let _: Result<SvCustomMsg, _> =
             super::sv::Querier::generic_query_one(&querier, SvCustomMsg {}, SvCustomMsg {});
diff --git a/sylvia-derive/src/associated_types.rs b/sylvia-derive/src/associated_types.rs
index 7225fe7c..bcee8571 100644
--- a/sylvia-derive/src/associated_types.rs
+++ b/sylvia-derive/src/associated_types.rs
@@ -24,6 +24,10 @@ impl<'a> AssociatedTypes<'a> {
         Self(associated_types)
     }
 
+    pub fn all_names(&self) -> impl Iterator<Item = &Ident> {
+        self.0.iter().map(|associated| &associated.ident)
+    }
+
     pub fn without_error(&self) -> impl Iterator<Item = &TraitItemType> {
         self.0
             .iter()
@@ -62,7 +66,7 @@ impl<'a> AssociatedTypes<'a> {
         }
     }
 
-    pub fn as_names(&self) -> impl Iterator<Item = &Ident> {
+    pub fn as_filtered_names(&self) -> impl Iterator<Item = &Ident> {
         self.filtered().map(|associated| &associated.ident)
     }
 
diff --git a/sylvia-derive/src/input.rs b/sylvia-derive/src/input.rs
index 6488fb6c..8f66eb73 100644
--- a/sylvia-derive/src/input.rs
+++ b/sylvia-derive/src/input.rs
@@ -62,7 +62,7 @@ impl<'a> TraitInput<'a> {
             custom,
         } = self;
         let messages = self.emit_messages();
-        let associated_names: Vec<_> = associated_types.as_names().collect();
+        let associated_names: Vec<_> = associated_types.as_filtered_names().collect();
 
         let query_variants =
             MsgVariants::new(item.as_variants(), MsgType::Query, &associated_names, &None);
diff --git a/sylvia-derive/src/querier.rs b/sylvia-derive/src/querier.rs
index 9920adec..3e1f61d3 100644
--- a/sylvia-derive/src/querier.rs
+++ b/sylvia-derive/src/querier.rs
@@ -44,6 +44,8 @@ where
             .map(ItemType::as_name)
             .collect();
 
+        let all_generics: Vec<_> = associated_types.all_names().collect();
+
         let assoc_types: Vec<_> = associated_types
             .without_special()
             .map(ItemType::as_name)
@@ -70,7 +72,7 @@ where
                 #(#methods_declaration)*
             }
 
-            impl <'a, C: #sylvia ::cw_std::CustomQuery, #(#generics,)*> Querier for #sylvia ::types::BoundQuerier<'a, C, std::marker::PhantomData< (#(#generics,)*) > > #where_clause {
+            impl <'a, C: #sylvia ::cw_std::CustomQuery, #(#all_generics,)*> Querier for #sylvia ::types::BoundQuerier<'a, C, &dyn #interface_name <#( #all_generics = #all_generics,)*> > #where_clause {
                 #(type #generics = #generics;)*
 
                 #(#methods_trait_impl)*
diff --git a/sylvia/tests/querier.rs b/sylvia/tests/querier.rs
index 17d1dd56..3440a681 100644
--- a/sylvia/tests/querier.rs
+++ b/sylvia/tests/querier.rs
@@ -114,11 +114,11 @@ impl CounterContract<'_> {
 
 #[cfg(test)]
 mod tests {
-    use crate::counter::sv::test_utils::CounterProxy;
     use cosmwasm_std::testing::mock_dependencies;
     use cosmwasm_std::{Addr, Empty, QuerierWrapper};
     use sylvia::multitest::App;
 
+    use crate::counter::sv::test_utils::CounterProxy;
     use crate::sv::multitest_utils::CodeId;
 
     #[test]