diff --git a/.circleci/config.yml b/.circleci/config.yml
index 88ad945..7e54d81 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2.1
 executors:
   aebuilder:
     docker:
-      - image: aeternity/builder
+      - image: aeternity/builder:xenial-otp21
         user: builder
     working_directory: ~/aesophia