diff --git a/circle.yml b/circle.yml
index af62d6c36..76e90a434 100644
--- a/circle.yml
+++ b/circle.yml
@@ -28,6 +28,7 @@ dependencies:
       fi
     - mkdir -p ~/.local/bin
     - curl -L --retry 3 https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+    - stack update
     - git submodule update --init --recursive
     - alias cmake=~/cmake-3.10.0-Linux-x86_64/bin/cmake
     - sudo pip install pyyaml
diff --git a/stack.yaml b/stack.yaml
index f79dac6b9..848a81174 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: nightly-2017-11-23
+resolver: nightly-2017-11-24
 
 packages:
 - 'aten'