diff --git a/cowait/engine/docker.py b/cowait/engine/docker.py
index 4d49acad..31f8df25 100644
--- a/cowait/engine/docker.py
+++ b/cowait/engine/docker.py
@@ -171,6 +171,11 @@ def kill_family(container):
         except docker.errors.NotFound:
             return [task_id]
 
+        except requests.exceptions.ChunkedEncodingError:
+            # workaround for a bug in docker on mac:
+            # https://github.com/docker/docker-py/issues/2696
+            return None
+
         except requests.exceptions.ConnectionError:
             raise ProviderError('Docker engine unavailable')
 
diff --git a/setup.py b/setup.py
index 668e9f78..03c2c84f 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,6 @@
 import setuptools
 
-VERSION = "0.3.4"
+VERSION = "0.3.5"
 
 with open("README.md", "r") as fh:
     long_description = fh.read()