diff --git a/Dockerfile b/Dockerfile
index 0684e90..7c090ab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,11 +3,11 @@ FROM ubuntu:latest
 ENV PYTHONIOENCODING=utf-8
 
 # Instalujemy niezbędne zależności. Zwróć uwagę na flagę "-y" (assume yes)
-RUN apt update && apt install -y python3 python3-pip git
+RUN apt update && apt install -y python3 python3-pip git locales
 
 RUN pip3 install requests
 
-RUN locale-gen en_US.UTF-8
+RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen en_US.UTF-8
 ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en' LC_ALL='en_US.UTF-8'