diff --git a/lib/oxigraph/src/storage/backend/rocksdb.rs b/lib/oxigraph/src/storage/backend/rocksdb.rs
index 14c45d0a..6f5561f4 100644
--- a/lib/oxigraph/src/storage/backend/rocksdb.rs
+++ b/lib/oxigraph/src/storage/backend/rocksdb.rs
@@ -9,7 +9,7 @@
 )]
 
 use crate::storage::error::{CorruptionError, StorageError};
-use libc::{self, c_void, free};
+use libc::{self, c_void};
 use oxrocksdb_sys::*;
 use rand::random;
 use std::borrow::Borrow;
@@ -625,7 +625,7 @@ impl Db {
                                 ffi_result!(rocksdb_transaction_commit_with_status(transaction));
                             rocksdb_transaction_destroy(transaction);
                             rocksdb_readoptions_destroy(read_options);
-                            free(snapshot as *mut c_void);
+                            rocksdb_free(snapshot as *mut c_void);
                             r.map_err(StorageError::from)?; // We make sure to also run destructors if the commit fails
                         }
                         return Ok(result);
@@ -636,7 +636,7 @@ impl Db {
                                 ffi_result!(rocksdb_transaction_rollback_with_status(transaction));
                             rocksdb_transaction_destroy(transaction);
                             rocksdb_readoptions_destroy(read_options);
-                            free(snapshot as *mut c_void);
+                            rocksdb_free(snapshot as *mut c_void);
                             r.map_err(StorageError::from)?; // We make sure to also run destructors if the commit fails
                         }
                         // We look for the root error
@@ -738,13 +738,14 @@ impl Db {
         }
     }
 
-    pub fn flush(&self, column_family: &ColumnFamily) -> Result<(), StorageError> {
+    pub fn flush(&self) -> Result<(), StorageError> {
         if let DbKind::ReadWrite(db) = &self.inner {
             unsafe {
-                ffi_result!(rocksdb_transactiondb_flush_cf_with_status(
+                ffi_result!(rocksdb_transactiondb_flush_cfs_with_status(
                     db.db,
                     db.flush_options,
-                    column_family.0,
+                    db.cf_handles.as_ptr().cast_mut(),
+                    db.cf_handles.len().try_into().unwrap()
                 ))
             }?;
             Ok(())
@@ -1190,7 +1191,7 @@ pub struct Buffer {
 impl Drop for Buffer {
     fn drop(&mut self) {
         unsafe {
-            free(self.base.cast());
+            rocksdb_free(self.base.cast());
         }
     }
 }
@@ -1325,7 +1326,7 @@ impl Drop for ErrorStatus {
     fn drop(&mut self) {
         if !self.0.string.is_null() {
             unsafe {
-                free(self.0.string as *mut c_void);
+                rocksdb_free(self.0.string as *mut c_void);
             }
         }
     }
diff --git a/lib/oxigraph/src/storage/mod.rs b/lib/oxigraph/src/storage/mod.rs
index 1f77d1b0..10d26c32 100644
--- a/lib/oxigraph/src/storage/mod.rs
+++ b/lib/oxigraph/src/storage/mod.rs
@@ -258,7 +258,7 @@ impl Storage {
     fn update_version(&self, version: u64) -> Result<(), StorageError> {
         self.db
             .insert(&self.default_cf, b"oxversion", &version.to_be_bytes())?;
-        self.db.flush(&self.default_cf)
+        self.db.flush()
     }
 
     pub fn snapshot(&self) -> StorageReader {
@@ -283,17 +283,7 @@ impl Storage {
 
     #[cfg(not(target_family = "wasm"))]
     pub fn flush(&self) -> Result<(), StorageError> {
-        self.db.flush(&self.default_cf)?;
-        self.db.flush(&self.gspo_cf)?;
-        self.db.flush(&self.gpos_cf)?;
-        self.db.flush(&self.gosp_cf)?;
-        self.db.flush(&self.spog_cf)?;
-        self.db.flush(&self.posg_cf)?;
-        self.db.flush(&self.ospg_cf)?;
-        self.db.flush(&self.dspo_cf)?;
-        self.db.flush(&self.dpos_cf)?;
-        self.db.flush(&self.dosp_cf)?;
-        self.db.flush(&self.id2str_cf)
+        self.db.flush()
     }
 
     #[cfg(not(target_family = "wasm"))]
diff --git a/oxrocksdb-sys/api/c.cc b/oxrocksdb-sys/api/c.cc
index 9a948ea2..b62ee7ff 100644
--- a/oxrocksdb-sys/api/c.cc
+++ b/oxrocksdb-sys/api/c.cc
@@ -272,11 +272,15 @@ void rocksdb_transactiondb_put_cf_with_status(
                               Slice(key, keylen), Slice(val, vallen)));
 }
 
-void rocksdb_transactiondb_flush_cf_with_status(
+void rocksdb_transactiondb_flush_cfs_with_status(
     rocksdb_transactiondb_t* db, const rocksdb_flushoptions_t* options,
-    rocksdb_column_family_handle_t* column_family,
+    rocksdb_column_family_handle_t** column_families, int num_column_families,
     rocksdb_status_t* statusptr) {
-  SaveStatus(statusptr, db->rep->Flush(options->rep, column_family->rep));
+  vector<ColumnFamilyHandle*> column_family_handles(num_column_families);
+  for (int i = 0; i < num_column_families; i++) {
+    column_family_handles[i] = column_families[i]->rep;
+  }
+  SaveStatus(statusptr, db->rep->Flush(options->rep, column_family_handles));
 }
 
 void rocksdb_transactiondb_compact_range_cf_opt_with_status(
diff --git a/oxrocksdb-sys/api/c.h b/oxrocksdb-sys/api/c.h
index 022e8f97..8b7c173e 100644
--- a/oxrocksdb-sys/api/c.h
+++ b/oxrocksdb-sys/api/c.h
@@ -114,9 +114,10 @@ extern ROCKSDB_LIBRARY_API void rocksdb_transactiondb_put_cf_with_status(
     rocksdb_column_family_handle_t* column_family, const char* key,
     size_t keylen, const char* val, size_t vallen, rocksdb_status_t* statusptr);
 
-extern ROCKSDB_LIBRARY_API void rocksdb_transactiondb_flush_cf_with_status(
+extern ROCKSDB_LIBRARY_API void rocksdb_transactiondb_flush_cfs_with_status(
     rocksdb_transactiondb_t* db, const rocksdb_flushoptions_t* options,
-    rocksdb_column_family_handle_t* column_family, rocksdb_status_t* statusptr);
+    rocksdb_column_family_handle_t** column_families, int num_column_families,
+    rocksdb_status_t* statusptr);
 
 extern ROCKSDB_LIBRARY_API void
 rocksdb_transactiondb_compact_range_cf_opt_with_status(