diff --git a/gitlab/conda_build_config.yaml b/gitlab/conda_build_config.yaml
index 632715a918643b770fd5981a89986dd61f79d0f4..0e64e1f0a9d16b72699453e4e4c123f3721c3ad4 100644
--- a/gitlab/conda_build_config.yaml
+++ b/gitlab/conda_build_config.yaml
@@ -44,7 +44,7 @@ zip_keys:
 # Ideally we want to build and test against older versions of dependencies.
 # Most of the pin numbers come from the anaconda package.
 bob_devel:
-  - 2018.03.29
+  - 2018.03.31
 
 ## The build time only dependencies.
 ## Updaing these to the latest version all the time is OK.