diff --git a/.flake8 b/.flake8
new file mode 100644
index 00000000..8a35911b
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,4 @@
+[flake8]
+# The GitHub editor is 127 chars wide
+max-line-length = 127
+max-complexity = 10
diff --git a/.gitignore b/.gitignore
index 721bb86e..45dda35d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,7 @@ data/models/ELMo/en/cache
 data/models/ELMo/fr/cache
 data/sequenceLabelling/CoNLL-2012-NER/eng.*
 env
+venv
 dist
 delft.egg-info
 build
diff --git a/.travis.yml b/.travis.yml
index 2f18b3f3..89f18543 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,13 +5,9 @@ python:
   - 3.5
 install:
   - pip install --upgrade pip
-  - pip install -r requirements.txt
-  - pip install flake8
+  - make venv-create dev-install
 before_script:
-  # stop the build if there are Python syntax errors or undefined names
-  - flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics
-  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
-  - flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+  - make flake8-syntax flake8-warning-only
 script:
   - true  # add other tests here
 notifications:
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..095d8c3b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,56 @@
+VENV = venv
+
+PIP = $(VENV)/bin/pip
+PYTHON = $(VENV)/bin/python
+RUN_GROBID_TAGGER = $(PYTHON) grobidTagger.py
+USE_GPU = 0
+
+ARGS =
+
+
+venv-clean:
+	@if [ -d "$(VENV)" ]; then \
+		rm -rf "$(VENV)"; \
+	fi
+
+
+venv-create:
+	virtualenv --system-site-packages -p python3 $(VENV)
+
+
+dev-install:
+	$(PIP) install -r requirements.txt
+	$(PIP) install -r requirements.dev.txt
+	@if [ "$(USE_GPU)" -eq "1" ]; then \
+		$(PIP) install -r requirements.gpu.txt; \
+	else \
+		$(PIP) install -r requirements.cpu.txt; \
+	fi
+
+
+dev-venv: venv-create dev-install
+
+
+flake8-syntax:
+	# stop the build if there are Python syntax errors or undefined names
+	$(PYTHON) -m flake8 delft *.py --count --select=E901,E999,F821,F822,F823 --show-source --statistics
+
+
+flake8-warning-only:
+	# exit-zero treats all errors as warnings.
+	$(PYTHON) -m flake8 delft *.py --count --exit-zero --statistics
+
+
+flake8:
+	$(PYTHON) -m flake8 delft *.py
+
+
+pylint:
+	$(PYTHON) -m pylint delft *.py
+
+
+tests: flake8 pylint
+
+
+grobid-tagger-train-header:
+	$(RUN_GROBID_TAGGER) header train $(ARGS)
diff --git a/requirements.cpu.txt b/requirements.cpu.txt
new file mode 100644
index 00000000..00ff3c23
--- /dev/null
+++ b/requirements.cpu.txt
@@ -0,0 +1 @@
+tensorflow==1.12.0
diff --git a/requirements.dev.txt b/requirements.dev.txt
new file mode 100644
index 00000000..e8f840d5
--- /dev/null
+++ b/requirements.dev.txt
@@ -0,0 +1,2 @@
+flake8==3.7.7
+pylint==2.3.1
diff --git a/requirements.gpu.txt b/requirements.gpu.txt
new file mode 100644
index 00000000..0a04a324
--- /dev/null
+++ b/requirements.gpu.txt
@@ -0,0 +1 @@
+tensorflow_gpu==1.12.0
diff --git a/requirements.txt b/requirements.txt
index 47490656..f701a8f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,6 @@ bleach>=2.1.0
 regex==2018.2.21
 scikit-learn==0.19.1
 tqdm==4.21
-tensorflow_gpu==1.12.0
 gensim==3.4.0
 langdetect==1.0.7
 textblob==0.15.1