diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..29758fb
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,56 @@
+version: 2
+jobs:
+  test:
+    docker:
+      - image: python:3.5
+    working_directory: ~/python-client
+    steps:
+      - checkout
+
+      - run:
+          command: pip install --upgrade pip tox
+      
+      - run:
+          command: | 
+            tox -e lint
+            tox -e py35
+  
+  pypi_upload:
+    docker:
+        - image: circleci/python:3.5
+    steps:
+      - run:
+          command: tox -e build_pypi
+
+  pypi_upload_rc:
+    docker:
+      - image: circleci/python:3.5
+    steps:
+      - run:
+          command: tox -e build_testpypi
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test
+  pypi_upload:
+    jobs:
+      - pypi_upload:
+          requires:
+            - test
+          filters:
+            tags:
+              only:
+                - /^[0-9]+.[0-9]+.[0-9]+$/
+
+      - pypi_upload_rc:
+          requires:
+            - test
+          filters:
+            tags:
+              only:
+                - /^[0-9]+.[0-9]+.[0-9]+-rc[0-9]+$/
+
+
+  
\ No newline at end of file
diff --git a/circle.yml b/circle.yml
deleted file mode 100644
index 1a85f0d..0000000
--- a/circle.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-machine:
-  environment:
-    COVERALLS_REPO_TOKEN: CUTHCbRbNtBjLFtFG4NSxVeIf1qQN3Zjo
-
-  python:
-    version: 3.5.0
-
-dependencies:
-  override:
-    - pip install -r requirements/dev.txt
-    - pip install tox-pyenv codecov coveralls twine
-    - pyenv local 2.7.10 3.5.0
-
-test:
-  override:
-    - tox
-
-  post:
-    - codecov
-    - coveralls
-
-deployment:
-  release:
-    tag: /^[0-9]+.[0-9]+.[0-9]+$/
-    commands:
-      - tox -e build_pypi
-
-  releaseCandidate:
-    tag: /^[0-9]+.[0-9]+.[0-9]+-rc[0-9]+$/
-    commands:
-      - tox -e build_testpypi
diff --git a/objectrocket/instances/mongodb.py b/objectrocket/instances/mongodb.py
index f0d253a..ebbc17c 100644
--- a/objectrocket/instances/mongodb.py
+++ b/objectrocket/instances/mongodb.py
@@ -195,7 +195,7 @@ def _compile_new_relic_stats(self, stats_this_second, stats_next_second):
             first_doc = stats_this_second['aggregate_server_statistics'][subdoc]
             second_doc = stats_next_second['aggregate_server_statistics'][subdoc]
             keys = set(first_doc.keys()) | set(second_doc.keys())
-            server_statistics_per_second[subdoc] = {key: int(second_doc[key]) - int(first_doc[key]) for key in keys}
+            server_statistics_per_second[subdoc] = {key: int(second_doc[key]) - int(first_doc[key]) for key in keys if isinstance(first_doc[key], int)}
         for node1, node2 in zip(stats_this_second['opcounters_per_node'], stats_next_second['opcounters_per_node']):
             node_opcounters_per_second = {}
             for repl, members in node2.items():
diff --git a/requirements/dev.txt b/requirements/dev.txt
index a4f3ca1..1a78b3b 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -4,7 +4,7 @@ flake8>=2.1.0
 mock>=1.0.1
 pytest>=2.5.2
 pytest-cov>=1.7.0
-setuptools>=2.1
+setuptools==40.2.0
 sphinx_rtd_theme
 tox>=2.1
 wheel>=0.22.0
diff --git a/setup.py b/setup.py
index 063f279..567acbf 100755
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 from setuptools import find_packages
 from setuptools import setup
 
-VERSION = ('0', '4', '9')
+VERSION = ('0', '4', '10')
 __version__ = '.'.join(VERSION)
 
 with open('README.md') as f: