diff --git a/docs/changelog.rst b/docs/changelog.rst
index 0cdebb4..bcbcb63 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -7,6 +7,11 @@
    and memory consumption whilst serving clients.  Those problems
    should not occur with Python 3.7.
 
+Version 1.7.2  (29 Jul 2018)
+============================
+
+* require aiorpcX 0.5.9; 0.5.8 didn't work on Python 3.7
+
 Version 1.7.1  (28 Jul 2018)
 ============================
 
diff --git a/docs/conf.py b/docs/conf.py
index 6935659..c1a6c95 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -15,7 +15,7 @@
 import os
 import sys
 sys.path.insert(0, os.path.abspath('..'))
-VERSION="ElectrumX 1.7.1"
+VERSION="ElectrumX 1.7.2"
 
 # -- Project information -----------------------------------------------------
 
diff --git a/electrumx/__init__.py b/electrumx/__init__.py
index 2781152..baae3ed 100644
--- a/electrumx/__init__.py
+++ b/electrumx/__init__.py
@@ -1,4 +1,4 @@
-version = 'ElectrumX 1.7.1'
+version = 'ElectrumX 1.7.2'
 version_short = version.split()[-1]
 
 from electrumx.server.controller import Controller
diff --git a/electrumx/server/controller.py b/electrumx/server/controller.py
index e1def1a..f6b0c15 100644
--- a/electrumx/server/controller.py
+++ b/electrumx/server/controller.py
@@ -81,7 +81,7 @@ class Controller(ServerBase):
         '''Start the RPC server and wait for the mempool to synchronize.  Then
         start serving external clients.
         '''
-        reqd_version = (0, 5, 8)
+        reqd_version = (0, 5, 9)
         if aiorpcx_version != reqd_version:
             raise RuntimeError('ElectrumX requires aiorpcX version '
                                f'{version_string(reqd_version)}')
diff --git a/setup.py b/setup.py
index fe4afbd..1f2e636 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,5 @@
 import setuptools
-version = '1.7.1'
+version = '1.7.2'
 
 setuptools.setup(
     name='electrumX',
@@ -11,7 +11,7 @@ setuptools.setup(
     # "tribus_hash" package is required to sync Denarius network.
     # "blake256" package is required to sync Decred network.
     # "xevan_hash" package is required to sync Xuez network.
-    install_requires=['aiorpcX == 0.5.8', 'attrs>=15',
+    install_requires=['aiorpcX == 0.5.9', 'attrs>=15',
                       'plyvel', 'pylru', 'aiohttp >= 2'],
     packages=setuptools.find_packages(include=('electrumx*',)),
     description='ElectrumX Server',