diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0c6de77..11d3fb0 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ jobs:
   build:
     working_directory: /root/project
     docker:
-      - image: karrlab/build:0.0.8
+      - image: karrlab/build:0.0.10
     steps:
       - checkout
       
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 141ebed..9eed924 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,5 @@
 cement
 configparser
-pbr # needed by sphinxcontrib-spelling and must be installed first for Python 2
 six
 Sphinx >= 1.6
 sphinx_rtd_theme