diff --git a/.circleci/config.yml b/.circleci/config.yml
index 40b93ea..69bb2e5 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,7 +30,7 @@ commands:
             - v2.3-dependencies-{{ .Environment.CIRCLE_JOB }}-{{ checksum "yarn.lock" }}-
             - v2.3-dependencies-{{ .Environment.CIRCLE_JOB }}-
 
-      - run: yarn install
+      - run: yarn install --frozen-lockfile
       - steps: << parameters.postinstall >>
 
       - save_cache: