diff --git a/stream/clients/python/bookkeeper/common/router/router.py b/stream/clients/python/bookkeeper/common/router/router.py
index f52ef645e54..8e67dc97df8 100644
--- a/stream/clients/python/bookkeeper/common/router/router.py
+++ b/stream/clients/python/bookkeeper/common/router/router.py
@@ -27,4 +27,4 @@ def __init__(self):
         return
 
     def getRoutingKey(self, key):
-        return mmh3.hash64(key, seed=__SEED__, signed=True)[0]
+        return mmh3.hash64(key, seed=__SEED__)[0]
diff --git a/stream/clients/python/scripts/test.sh b/stream/clients/python/scripts/test.sh
index df566303092..81ef1a58c96 100755
--- a/stream/clients/python/scripts/test.sh
+++ b/stream/clients/python/scripts/test.sh
@@ -19,6 +19,7 @@ set -e -x -u
 
 SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 
+PY_VERSION="3.8" NOXSESSION="unit" ${SCRIPT_DIR}/docker_tests.sh
 PY_VERSION="3.7" NOXSESSION="lint,lint_setup_py,unit" ${SCRIPT_DIR}/docker_tests.sh
 PY_VERSION="3.6" NOXSESSION="unit" ${SCRIPT_DIR}/docker_tests.sh
 PY_VERSION="3.5" NOXSESSION="unit" ${SCRIPT_DIR}/docker_tests.sh
diff --git a/stream/clients/python/setup.py b/stream/clients/python/setup.py
index 172545ba9e8..7d949ee469f 100644
--- a/stream/clients/python/setup.py
+++ b/stream/clients/python/setup.py
@@ -32,8 +32,8 @@
     'six>=1.10.0',
     'pytz',
     'futures>=3.2.0;python_version<"3.2"',
-    'grpcio<1.26.0,>=1.8.2',
-    'pymmh3>=0.0.3'
+    'grpcio<1.28,>=1.8.2',
+    'pymmh3>=0.0.5'
 ]
 extras = {
 }