diff --git a/mmgen_node_tools/Ticker.py b/mmgen_node_tools/Ticker.py
index e8b704f..33fb1fa 100755
--- a/mmgen_node_tools/Ticker.py
+++ b/mmgen_node_tools/Ticker.py
@@ -440,7 +440,8 @@ def gen_data(data):
 						d['percent_change_7d']  = d['quotes']['USD']['percent_change_7d']
 						d['percent_change_30d'] = d['quotes']['USD']['percent_change_30d']
 						d['percent_change_1y']  = d['quotes']['USD']['percent_change_1y']
-						d['last_updated'] = int(datetime.datetime.fromisoformat(d['last_updated']).timestamp())
+						# .replace('Z','+00:00') -- Python 3.9 backport
+						d['last_updated'] = int(datetime.datetime.fromisoformat(d['last_updated'].replace('Z','+00:00')).timestamp())
 					yield (d['id'],d)
 					found[k].add(d[k])
 					wants[k].remove(d[k])
diff --git a/mmgen_node_tools/data/version b/mmgen_node_tools/data/version
index f5f664c..0ed23d0 100644
--- a/mmgen_node_tools/data/version
+++ b/mmgen_node_tools/data/version
@@ -1 +1 @@
-3.3.dev1
+3.3.dev2
diff --git a/setup.cfg b/setup.cfg
index c99a9ef..82704a4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,11 +24,11 @@ classifiers  =
 	Development Status :: 5 - Production/Stable
 
 [options]
-python_requires = >=3.8
+python_requires = >=3.9
 include_package_data = True
 
 install_requires =
-	mmgen-wallet>=14.1.dev2
+	mmgen-wallet>=14.1.dev8
 	pyyaml
 	yahooquery