diff --git a/Procfile b/Procfile
index cf788543..efc0d76f 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: gunicorn -k eventlet todo:app --log-file -
+web: gunicorn -k gevent todo:app --log-file -
diff --git a/circle.yml b/circle.yml
index 46c96fb5..9f0bd373 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,6 +1,6 @@
 machine:
     python:
-        version: 3.4.2
+        version: 2.7.9
 
 test:
     override:
diff --git a/requirements.txt b/requirements.txt
index 92c307d0..32b3b4da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
 decorator==3.4.2
-eventlet==0.17.4
 Flask==0.10.1
 Flask-Cors==2.0.1
 Flask-SQLAlchemy==2.0
+gevent==1.0.2
 greenlet==0.4.7
 gunicorn==19.3.0
 itsdangerous==0.24
diff --git a/runtime.txt b/runtime.txt
index 79672da1..c47075b0 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-3.4.3
+python-2.7.9