diff --git a/lower-constraints.txt b/lower-constraints.txt
index 5fdf6a543..46163fee0 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -64,7 +64,7 @@ msgpack==0.5.6
 munch==2.2.0
 netaddr==0.7.19
 netifaces==0.10.6
-networkx==1.11
+networkx==2.2
 openstackdocstheme==1.20.0
 openstacksdk==0.12.0
 os-api-ref===1.4.0
@@ -145,7 +145,7 @@ sqlparse==0.2.4
 statsd==3.2.2
 stestr==2.0.0
 stevedore==1.28.0
-taskflow==3.1.0
+taskflow==3.7.1
 Tempita==0.5.2
 tenacity==4.9.0
 testresources==2.0.1
diff --git a/requirements.txt b/requirements.txt
index bb10adffb..c5bf3b3e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,9 +42,9 @@ python-ironicclient>=2.5.0 # Apache-2.0
 six>=1.11.0 # MIT
 SQLAlchemy>=1.2.5 # MIT
 stevedore>=1.28.0 # Apache-2.0
-taskflow>=3.1.0 # Apache-2.0
+taskflow>=3.7.1 # Apache-2.0
 WebOb>=1.8.5 # MIT
 WSME>=0.9.2 # MIT
-networkx>=1.11;python_version>='3.4' # BSD
+networkx>=2.2;python_version>='3.4' # BSD
 microversion_parse>=0.2.1 # Apache-2.0
 futurist>=1.8.0 # Apache-2.0
diff --git a/watcher/decision_engine/model/model_root.py b/watcher/decision_engine/model/model_root.py
index 74fe6a36c..d200196da 100644
--- a/watcher/decision_engine/model/model_root.py
+++ b/watcher/decision_engine/model/model_root.py
@@ -171,7 +171,7 @@ class ModelRoot(nx.DiGraph, base.Model):
 
     def _get_by_uuid(self, uuid):
         try:
-            return self.node[uuid]['attr']
+            return self.nodes[uuid]['attr']
         except Exception as exc:
             LOG.exception(exc)
             raise exception.ComputeResourceNotFound(name=uuid)
@@ -466,14 +466,14 @@ class StorageModelRoot(nx.DiGraph, base.Model):
 
     def _get_by_uuid(self, uuid):
         try:
-            return self.node[uuid]['attr']
+            return self.nodes[uuid]['attr']
         except Exception as exc:
             LOG.exception(exc)
             raise exception.StorageResourceNotFound(name=uuid)
 
     def _get_by_name(self, name):
         try:
-            return self.node[name]['attr']
+            return self.nodes[name]['attr']
         except Exception as exc:
             LOG.exception(exc)
             raise exception.StorageResourceNotFound(name=name)
@@ -648,7 +648,7 @@ class BaremetalModelRoot(nx.DiGraph, base.Model):
 
     def _get_by_uuid(self, uuid):
         try:
-            return self.node[uuid]['attr']
+            return self.nodes[uuid]['attr']
         except Exception as exc:
             LOG.exception(exc)
         raise exception.BaremetalResourceNotFound(name=uuid)