diff --git a/{{ cookiecutter.repo_name }}/docker/dev.Dockerfile b/{{ cookiecutter.repo_name }}/docker/dev.Dockerfile
index 67b1e640e..0682373dd 100644
--- a/{{ cookiecutter.repo_name }}/docker/dev.Dockerfile	
+++ b/{{ cookiecutter.repo_name }}/docker/dev.Dockerfile	
@@ -1,9 +1,6 @@
 FROM python:3.8-slim-buster
 
 ENV PATH ${PATH}:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US.UTF-8
-ENV LC_ALL en_US.UTF-8
 ENV DEBIAN_FRONTEND noninteractive
 
 WORKDIR /home
@@ -13,11 +10,9 @@ RUN apt-get clean && apt-get update \
   && apt-get install -y apt-utils
 
 RUN apt-get install -y gnupg \
-  zlibc \
-  software-properties-common \
-  locales-all
+  build-essential
 
-RUN pip install --upgrade setuptools wheel
+RUN pip install setuptools wheel cython
 
 COPY requirements.txt requirements_dev.txt ./
 
diff --git a/{{ cookiecutter.repo_name }}/docker/prod.Dockerfile b/{{ cookiecutter.repo_name }}/docker/prod.Dockerfile
index 6507a85d8..de689e72e 100644
--- a/{{ cookiecutter.repo_name }}/docker/prod.Dockerfile	
+++ b/{{ cookiecutter.repo_name }}/docker/prod.Dockerfile	
@@ -1,9 +1,6 @@
 FROM python:3.8-slim-buster
 
 ENV PATH ${PATH}:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US.UTF-8
-ENV LC_ALL en_US.UTF-8
 ENV DEBIAN_FRONTEND noninteractive
 
 WORKDIR /home
@@ -13,11 +10,9 @@ RUN apt-get clean && apt-get update \
   && apt-get install -y apt-utils
 
 RUN apt-get install -y gnupg \
-  zlibc \
-  software-properties-common \
-  locales-all
+  build-essential
 
-RUN pip install --upgrade setuptools wheel
+RUN pip install setuptools wheel cython
 
 COPY requirements.txt ./