diff --git a/Containerfile b/Containerfile
index 18ef5a0..e485a19 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,5 +1,8 @@
 FROM forgejo.maciej.cloud/pkg/mc-fedora-base
 
+# required by ansible-config
+ENV LANG="C.UTF-8"
+
 # libicu - for marksman linter
 ENV NEOVIM_PKGS="\
     wget \