diff --git a/neveko-core/src/db.rs b/neveko-core/src/db.rs
index 1567f35..b81ca51 100644
--- a/neveko-core/src/db.rs
+++ b/neveko-core/src/db.rs
@@ -40,6 +40,8 @@ impl Interface {
             env_str = "lmdb";
         };
         let env = EnvBuilder::new()
+            // increase map size for writing the multisig txset
+            .map_size(crate::LMDB_MAPSIZE)
             .open(format!("{}/{}", file_path, env_str), 0o777)
             .expect(&format!("could not open LMDB at {}", file_path));
         let handle = env.get_default_db(DbFlags::empty()).unwrap();
diff --git a/neveko-core/src/lib.rs b/neveko-core/src/lib.rs
index 8fa988c..7aedb6e 100644
--- a/neveko-core/src/lib.rs
+++ b/neveko-core/src/lib.rs
@@ -65,4 +65,6 @@ pub const MONERO_RELEASE_HASH: &str =
 pub const I2P_ZERO_RELEASE_VERSION: &str = "v1.21";
 pub const I2P_ZERO_RELEASH_HASH: &str =
     "14f34052ad6abb0c24b048816b0ea86b696ae350dd139dd1e90a67ca88e1d07a";
+
+pub const LMDB_MAPSIZE: u64 = 1 * 1024 * 1024 * 1024;
 // DO NOT EDIT BELOW THIS LINE