diff --git a/meilidb-core/Cargo.toml b/meilidb-core/Cargo.toml
index b9f0deaa7..35f31468d 100644
--- a/meilidb-core/Cargo.toml
+++ b/meilidb-core/Cargo.toml
@@ -12,7 +12,7 @@ crossbeam-channel = "0.3.9"
 deunicode = "1.0.0"
 env_logger = "0.7.0"
 hashbrown = { version = "0.6.0", features = ["serde"] }
-heed = "0.1.0"
+heed = "0.3.0"
 log = "0.4.8"
 meilidb-schema = { path = "../meilidb-schema", version = "0.6.0" }
 meilidb-tokenizer = { path = "../meilidb-tokenizer", version = "0.6.0" }
diff --git a/meilidb-core/src/database.rs b/meilidb-core/src/database.rs
index 416b806a4..fa5b6bfde 100644
--- a/meilidb-core/src/database.rs
+++ b/meilidb-core/src/database.rs
@@ -72,7 +72,7 @@ impl Database {
             .max_dbs(3000)
             .open(path)?;
 
-        let common_store = env.create_dyn_database(Some("common"))?;
+        let common_store = env.create_poly_database(Some("common"))?;
         let indexes_store = env.create_database::<Str, Unit>(Some("indexes"))?;
 
         // list all indexes that needs to be opened
diff --git a/meilidb-core/src/store/documents_fields.rs b/meilidb-core/src/store/documents_fields.rs
index f4c218501..f63a5fa1c 100644
--- a/meilidb-core/src/store/documents_fields.rs
+++ b/meilidb-core/src/store/documents_fields.rs
@@ -29,7 +29,7 @@ impl DocumentsFields {
     ) -> ZResult<usize> {
         let start = DocumentAttrKey::new(document_id, SchemaAttr::min());
         let end = DocumentAttrKey::new(document_id, SchemaAttr::max());
-        self.documents_fields.delete_range(writer, start..=end)
+        self.documents_fields.delete_range(writer, &(start..=end))
     }
 
     pub fn clear(self, writer: &mut heed::RwTxn) -> ZResult<()> {
@@ -53,7 +53,7 @@ impl DocumentsFields {
     ) -> ZResult<DocumentFieldsIter<'txn>> {
         let start = DocumentAttrKey::new(document_id, SchemaAttr::min());
         let end = DocumentAttrKey::new(document_id, SchemaAttr::max());
-        let iter = self.documents_fields.range(reader, start..=end)?;
+        let iter = self.documents_fields.range(reader, &(start..=end))?;
         Ok(DocumentFieldsIter { iter })
     }
 }
diff --git a/meilidb-core/src/store/documents_fields_counts.rs b/meilidb-core/src/store/documents_fields_counts.rs
index 2070cff6e..67c28682b 100644
--- a/meilidb-core/src/store/documents_fields_counts.rs
+++ b/meilidb-core/src/store/documents_fields_counts.rs
@@ -29,7 +29,7 @@ impl DocumentsFieldsCounts {
         let start = DocumentAttrKey::new(document_id, SchemaAttr::min());
         let end = DocumentAttrKey::new(document_id, SchemaAttr::max());
         self.documents_fields_counts
-            .delete_range(writer, start..=end)
+            .delete_range(writer, &(start..=end))
     }
 
     pub fn clear(self, writer: &mut heed::RwTxn) -> ZResult<()> {
@@ -56,7 +56,7 @@ impl DocumentsFieldsCounts {
     ) -> ZResult<DocumentFieldsCountsIter<'txn>> {
         let start = DocumentAttrKey::new(document_id, SchemaAttr::min());
         let end = DocumentAttrKey::new(document_id, SchemaAttr::max());
-        let iter = self.documents_fields_counts.range(reader, start..=end)?;
+        let iter = self.documents_fields_counts.range(reader, &(start..=end))?;
         Ok(DocumentFieldsCountsIter { iter })
     }
 
diff --git a/meilidb-core/src/store/mod.rs b/meilidb-core/src/store/mod.rs
index a8ea439ed..72317e202 100644
--- a/meilidb-core/src/store/mod.rs
+++ b/meilidb-core/src/store/mod.rs
@@ -283,7 +283,7 @@ pub fn create(
     let updates_results_name = updates_results_name(name);
 
     // open all the stores
-    let main = env.create_dyn_database(Some(&main_name))?;
+    let main = env.create_poly_database(Some(&main_name))?;
     let postings_lists = env.create_database(Some(&postings_lists_name))?;
     let documents_fields = env.create_database(Some(&documents_fields_name))?;
     let documents_fields_counts = env.create_database(Some(&documents_fields_counts_name))?;
@@ -323,7 +323,7 @@ pub fn open(
     let updates_results_name = updates_results_name(name);
 
     // open all the stores
-    let main = match env.open_dyn_database(Some(&main_name))? {
+    let main = match env.open_poly_database(Some(&main_name))? {
         Some(main) => main,
         None => return Ok(None),
     };
diff --git a/meilidb-http/Cargo.toml b/meilidb-http/Cargo.toml
index 890c8aec8..12c1a5fc6 100644
--- a/meilidb-http/Cargo.toml
+++ b/meilidb-http/Cargo.toml
@@ -13,7 +13,7 @@ chrono = { version = "0.4.9", features = ["serde"] }
 crossbeam-channel = "0.3.9"
 envconfig = "0.5.1"
 envconfig_derive = "0.5.1"
-heed = "0.1.0"
+heed = "0.3.0"
 http = "0.1.19"
 indexmap = { version = "1.3.0", features = ["serde-1"] }
 jemallocator = "0.3.2"