diff --git a/requirements.txt b/requirements.txt
index cf65e5f..3fb9502 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-py-ecc==4.0.0 \
-    --hash=sha256:0712a1ebc2d45417088aa613f28518c1714c99d023998e50244c91e3acbb0d6c \
-    --hash=sha256:a637edcce7e31ddefae0a3c1018f16e25c9428fcd524b1ac5ceeb2adfc433276
+py-ecc==5.0.0 \
+    --hash=sha256:67a6b944722408c75bb630617dfbd8062c45b72d154ed3a6891c833717c87638 \
+    --hash=sha256:9d3c7ba607ef36d7f8af9944d702799014b27fc77b385d14024f96f9f610ad0a
 pycryptodome==3.9.8 \
     --hash=sha256:02e51e1d5828d58f154896ddfd003e2e7584869c275e5acbe290443575370fba \
     --hash=sha256:03d5cca8618620f45fd40f827423f82b86b3a202c8d44108601b0f5f56b04299 \
diff --git a/tests/test_key_handling/test_key_derivation/test_tree.py b/tests/test_key_handling/test_key_derivation/test_tree.py
index c74d4cb..6a6bd1c 100644
--- a/tests/test_key_handling/test_key_derivation/test_tree.py
+++ b/tests/test_key_handling/test_key_derivation/test_tree.py
@@ -17,7 +17,6 @@ with open(test_vector_filefolder, 'r') as f:
     test_vectors = json.load(f)['kdf_tests']
 
 
-@pytest.mark.skip(reason="py_ecc doesn't support BLS v4 yet")
 @pytest.mark.parametrize(
     'test',
     test_vectors
@@ -27,7 +26,6 @@ def test_hkdf_mod_r(test) -> None:
     assert bls.KeyGen(seed) == _HKDF_mod_r(IKM=seed)
 
 
-@pytest.mark.skip(reason="py_ecc doesn't support BLS v4 yet")
 @pytest.mark.parametrize(
     'seed',
     [b'\x00' * 32]