diff --git a/requirements.txt b/requirements.txt
index 1f128150..40317eb5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+blake2b-py
 coloredlogs>=10.0
 coincurve
 configparser>=3.5.0
diff --git a/setup.py b/setup.py
index 70ea728c..c74081b2 100755
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@ REQUIRES_PYTHON = ">=3.6.0"
 
 # What packages are required for this module to be executed?
 REQUIRED = [
+    "blake2b-py",
     "coloredlogs>=10.0",
     "coincurve",
     "py_ecc<5.0.0,>=1.4.7",