diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2ce5b055..1dadbe82 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -57,6 +57,8 @@ jobs:
     needs: setup_matrix
     runs-on: ubuntu-latest
     env:
+      LANG: en_US
+      LC_ALL: en_US.UTF-8
       BUNDLE_WITHOUT: development:test:release
     strategy:
       fail-fast: false