diff --git a/Dockerfile.dev b/Dockerfile.dev
index e5ae551d5..6e80ee94d 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -14,7 +14,7 @@ RUN apt install -y git npm locales sudo
 
 # setup locales
 # https://stackoverflow.com/questions/28405902/how-to-set-the-locale-inside-a-debian-ubuntu-docker-container
-RUN echo 'en_US.UTF-8' > /etc/locale.gen && locale-gen
+RUN echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen && locale-gen
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
@@ -52,4 +52,4 @@ RUN mkdir node_modules && \
 	chown tachi:1000 node_modules .pnpm-store
 
 # keep container alive indefinitely
-CMD ["/bin/fish"]
\ No newline at end of file
+CMD ["/bin/fish"]