diff --git a/Dockerfile b/Dockerfile
index 800c24f..2431bb7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,28 +1,22 @@
-FROM debian:9-slim
+FROM debian:10-slim
 
 
-# Define image metadata
 LABEL maintainer="inf_sfb1288@lists.uni-bielefeld.de"
 
 
 ENV LANG=C.UTF-8
 
 
-# Install prerequisites
 RUN apt-get update \
  && apt-get install -y --no-install-recommends \
-      build-essential \
       python2.7 \
-      python3.5 \
-      python3-dev \
+      python3.7 \
       python3-pip \
       zip \
- && rm -rf /var/lib/apt/lists/* \
  && pip3 install \
-      setuptools \
-      wheel \
       chardet
 
+
 ENV PYFLOW_VERSION=1.1.20
 ADD "https://github.com/Illumina/pyflow/releases/download/v${PYFLOW_VERSION}/pyflow-${PYFLOW_VERSION}.tar.gz" .
 RUN tar -xzf "pyflow-${PYFLOW_VERSION}.tar.gz" \
@@ -33,11 +27,10 @@ RUN tar -xzf "pyflow-${PYFLOW_VERSION}.tar.gz" \
       "pyflow-${PYFLOW_VERSION}" \
       "pyflow-${PYFLOW_VERSION}.tar.gz"
 
+
 ENV SPACY_VERSION=2.2.4
 ENV SPACY_MODELS_VERSION=2.2.5
-
-RUN pip3 install \
-      "spacy==${SPACY_VERSION}" \
+RUN pip3 install "spacy==${SPACY_VERSION}" \
  && python3 -m spacy download "de_core_news_sm-${SPACY_MODELS_VERSION}" --direct \
  && python3 -m spacy download "el_core_news_sm-${SPACY_MODELS_VERSION}" --direct \
  && python3 -m spacy download "en_core_web_sm-${SPACY_MODELS_VERSION}" --direct \
@@ -48,7 +41,9 @@ RUN pip3 install \
  && python3 -m spacy download "pt_core_news_sm-${SPACY_MODELS_VERSION}" --direct
 
 
-# Install NLP pipeline
+RUN rm -rf /var/lib/apt/lists/*
+
+
 COPY nlp /usr/local/bin
 COPY spacy-nlp /usr/local/bin
 
diff --git a/spacy-nlp b/spacy-nlp
index a92d535..8615b8d 100755
--- a/spacy-nlp
+++ b/spacy-nlp
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3.5
+#!/usr/bin/env python3.7
 # coding=utf-8
 
 from argparse import ArgumentParser