diff --git a/zrml/combinatorial-tokens/src/lib.rs b/zrml/combinatorial-tokens/src/lib.rs
index 4c8c08b97..f12e77c2b 100644
--- a/zrml/combinatorial-tokens/src/lib.rs
+++ b/zrml/combinatorial-tokens/src/lib.rs
@@ -14,6 +14,14 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Zeitgeist. If not, see <https://www.gnu.org/licenses/>.
+//
+// This file incorporates work licensed under the GNU Lesser General
+// Public License 3.0 but published without copyright notice by Gnosis
+// (<https://gnosis.io>, info@gnosis.io) in the
+// conditional-tokens-contracts repository
+// <https://github.com/gnosis/conditional-tokens-contracts>,
+// and has been relicensed under GPL-3.0-or-later in this repository.
+
 
 // TODO Refactor so that collection IDs are their own type with an `Fq` field and an `odd` field?
 
diff --git a/zrml/combinatorial-tokens/src/traits/combinatorial_id_manager.rs b/zrml/combinatorial-tokens/src/traits/combinatorial_id_manager.rs
index 613739e87..18614d582 100644
--- a/zrml/combinatorial-tokens/src/traits/combinatorial_id_manager.rs
+++ b/zrml/combinatorial-tokens/src/traits/combinatorial_id_manager.rs
@@ -14,6 +14,14 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Zeitgeist. If not, see <https://www.gnu.org/licenses/>.
+//
+// This file incorporates work licensed under the GNU Lesser General
+// Public License 3.0 but published without copyright notice by Gnosis
+// (<https://gnosis.io>, info@gnosis.io) in the
+// conditional-tokens-contracts repository
+// <https://github.com/gnosis/conditional-tokens-contracts>,
+// and has been relicensed under GPL-3.0-or-later in this repository.
+
 
 pub trait CombinatorialIdManager {
     type Asset;
diff --git a/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/decompressor/mod.rs b/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/decompressor/mod.rs
index d56cfa8a4..392ae3c39 100644
--- a/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/decompressor/mod.rs
+++ b/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/decompressor/mod.rs
@@ -14,6 +14,13 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Zeitgeist. If not, see <https://www.gnu.org/licenses/>.
+//
+// This file incorporates work licensed under the GNU Lesser General
+// Public License 3.0 but published without copyright notice by Gnosis
+// (<https://gnosis.io>, info@gnosis.io) in the
+// conditional-tokens-contracts repository
+// <https://github.com/gnosis/conditional-tokens-contracts>,
+// and has been relicensed under GPL-3.0-or-later in this repository.
 
 use ark_bn254::{g1::G1Affine, Fq};
 use ark_ff::{BigInteger, PrimeField};
diff --git a/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/mod.rs b/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/mod.rs
index 3745fd444..10ca64d8f 100644
--- a/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/mod.rs
+++ b/zrml/combinatorial-tokens/src/types/cryptographic_id_manager/mod.rs
@@ -14,6 +14,13 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with Zeitgeist. If not, see <https://www.gnu.org/licenses/>.
+//
+// This file incorporates work licensed under the GNU Lesser General
+// Public License 3.0 but published without copyright notice by Gnosis
+// (<https://gnosis.io>, info@gnosis.io) in the
+// conditional-tokens-contracts repository
+// <https://github.com/gnosis/conditional-tokens-contracts>,
+// and has been relicensed under GPL-3.0-or-later in this repository.
 
 use crate::traits::CombinatorialIdManager;
 use alloc::vec::Vec;