diff --git a/python/requirements.txt b/python/requirements.txt
index b95d98957..9b4ffe82e 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -5,5 +5,4 @@ click>=7,<9
 libusb1>=1.6.4
 construct>=2.9,!=2.10.55
 typing_extensions>=3.7.4
-pyblake2>=0.9.3 ; python_version<'3.6'
 attrs
diff --git a/python/setup.py b/python/setup.py
index 425310240..0c030a05f 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -13,7 +13,6 @@ install_requires = [
     "libusb1>=1.6.4",
     "construct>=2.9",
     "typing_extensions>=3.7.4",
-    "pyblake2>=0.9.3 ; python_version<'3.6'",
     "attrs",
 ]
 
diff --git a/python/src/trezorlib/_internal/firmware_headers.py b/python/src/trezorlib/_internal/firmware_headers.py
index db78da240..e8db51e70 100644
--- a/python/src/trezorlib/_internal/firmware_headers.py
+++ b/python/src/trezorlib/_internal/firmware_headers.py
@@ -1,5 +1,6 @@
 import struct
 from enum import Enum
+from hashlib import blake2s
 from typing import Any, List, Optional
 
 import click
@@ -7,12 +8,6 @@ import construct as c
 
 from .. import cosi, firmware
 
-try:
-    from hashlib import blake2s
-except ImportError:
-    from pyblake2 import blake2s
-
-
 SYM_OK = click.style("\u2714", fg="green")
 SYM_FAIL = click.style("\u274c", fg="red")
 
diff --git a/python/src/trezorlib/firmware.py b/python/src/trezorlib/firmware.py
index 64d958308..f7e8049b2 100644
--- a/python/src/trezorlib/firmware.py
+++ b/python/src/trezorlib/firmware.py
@@ -16,6 +16,7 @@
 
 import hashlib
 from enum import Enum
+from hashlib import blake2s
 from typing import Callable, List, Tuple
 
 import construct as c
@@ -23,12 +24,6 @@ import ecdsa
 
 from . import cosi, messages, tools
 
-try:
-    from hashlib import blake2s
-except ImportError:
-    from pyblake2 import blake2s
-
-
 V1_SIGNATURE_SLOTS = 3
 V1_BOOTLOADER_KEYS = [
     bytes.fromhex(key)