diff --git a/shippable.yml b/shippable.yml
index d025bee6..7b379425 100644
--- a/shippable.yml
+++ b/shippable.yml
@@ -8,7 +8,7 @@ branches:
 build:
     pre_ci_boot:
         image_name: reznik/gnat
-        image_tag: gpl.2017.slim
+        image_tag: gpl.2018.slim
         pull: true
     ci:
         - /opt/gnat/bin/gprbuild -p -P alire_env