diff --git a/Dockerfile b/Dockerfile
index 302f09c..527849b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,20 +21,20 @@ RUN apt-get update && apt-get install -qqy \
     mkdir /home/syncano
 
 WORKDIR /home/syncano/
-RUN virtualenv v4.1 && \
-    . v4.1/bin/activate && \
-    pip install -r /tmp/requirements_v41.txt && \
+RUN virtualenv v4.2 && \
+    . v4.2/bin/activate && \
+    pip install -r /tmp/requirements_v42.txt && \
     pip install -r /tmp/external_requirements.txt && \
     deactivate
 
-RUN virtualenv v4.2 && \
-    . v4.2/bin/activate && \
+RUN virtualenv v5.0 && \
+    . v5.0/bin/activate && \
     pip install -r /tmp/requirements.txt && \
     pip install -r /tmp/external_requirements.txt
 
-RUN ln -sf /home/syncano/v4.1/bin/python /usr/bin/python && \
-    ln -sf /home/syncano/v4.2/bin/python /usr/bin/python27-42 && \
-    ln -sf /home/syncano/v4.1/bin/python /usr/bin/python27-41
+RUN ln -sf /home/syncano/v4.2/bin/python /usr/bin/python && \
+    ln -sf /home/syncano/v5.0/bin/python /usr/bin/python27-lib5.0 && \
+    ln -sf /home/syncano/v4.2/bin/python /usr/bin/python27-lib4.2
 # create a special user to run code
 # user without root privileges greatly improves security
 RUN useradd syncano -d /tmp -s /bin/bash
diff --git a/circle.yml b/circle.yml
index 85989ad..f947919 100644
--- a/circle.yml
+++ b/circle.yml
@@ -9,9 +9,11 @@ dependencies:
 test:
   override:
     - docker run -it -v `pwd`/test.py:/tmp/test.py quay.io/syncano/python-codebox python /tmp/test.py
-    - docker run -it -v `pwd`/test.py:/tmp/test.py quay.io/syncano/python-codebox python27-42 /tmp/test.py
+    - docker run -it -v `pwd`/test.py:/tmp/test.py quay.io/syncano/python-codebox python27-lib4.2 /tmp/test.py
+    - docker run -it -v `pwd`/test.py:/tmp/test.py quay.io/syncano/python-codebox python27-lib5.0 /tmp/test.py
     - docker run -it -v `pwd`/test2.py:/tmp/test.py quay.io/syncano/python-codebox python /tmp/test.py
-    - docker run -it -v `pwd`/test3.py:/tmp/test.py quay.io/syncano/python-codebox python27-42 /tmp/test.py
+    - docker run -it -v `pwd`/test2.py:/tmp/test.py quay.io/syncano/python-codebox python27-lib4.2 /tmp/test.py
+    - docker run -it -v `pwd`/test3.py:/tmp/test.py quay.io/syncano/python-codebox python27-lib5.0 /tmp/test.py
 
 deployment:
   production:
diff --git a/requirements.txt b/requirements.txt
index b711e79..3b477a8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,4 +23,4 @@ fastly==0.0.2
 pandas==0.17.1
 BeautifulSoup==3.2.1
 boto3==1.2.5
-syncano==4.2.0
+syncano==5.0.0
diff --git a/requirements_v41.txt b/requirements_v42.txt
similarity index 96%
rename from requirements_v41.txt
rename to requirements_v42.txt
index 4f0432d..b711e79 100644
--- a/requirements_v41.txt
+++ b/requirements_v42.txt
@@ -23,4 +23,4 @@ fastly==0.0.2
 pandas==0.17.1
 BeautifulSoup==3.2.1
 boto3==1.2.5
-syncano==4.1.0
+syncano==4.2.0
diff --git a/test2.py b/test2.py
index a8ff144..a1e37cf 100644
--- a/test2.py
+++ b/test2.py
@@ -1,2 +1,2 @@
 import syncano
-assert syncano.__version__ == '4.1.0'
+assert syncano.__version__ == '4.2.0'
diff --git a/test3.py b/test3.py
index a1e37cf..43d5f1f 100644
--- a/test3.py
+++ b/test3.py
@@ -1,2 +1,2 @@
 import syncano
-assert syncano.__version__ == '4.2.0'
+assert syncano.__version__ == '5.0.0'