diff --git a/fuzzing/README.rst b/fuzzing/README.rst
index 6fb4c9ad..1fc00802 100644
--- a/fuzzing/README.rst
+++ b/fuzzing/README.rst
@@ -5,11 +5,9 @@ Uses `python-afl <https://github.com/jwilk/python-afl>`__ and `afl
 <https://lcamtuf.coredump.cx/afl/>`__
 
 * Install afl, for example ``sudo apt install afl++`` on Debian/Ubuntu
-* ``poetry install``
+* ``poetry install -E fuzzing-dev``
 * ``poetry shell``
 * Add some example files into ``_examples``
 * ``./run.sh`` will start multiple afl-fuzz instances
-* Run ``watch -n 1 -c afl-whatsup -s _results`` to see a summary
-  of all active runners
 * CTRL+C to stop
 * Run ``./check_crashes.sh`` to get a summary of the errors found
diff --git a/fuzzing/poetry.lock b/fuzzing/poetry.lock
deleted file mode 100644
index 7f997150..00000000
--- a/fuzzing/poetry.lock
+++ /dev/null
@@ -1,58 +0,0 @@
-[[package]]
-category = "main"
-description = "The Cython compiler for writing C extensions for the Python language."
-name = "cython"
-optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "0.29.15"
-
-[[package]]
-category = "main"
-description = "American Fuzzy Lop fork server and instrumentation for pure-Python code"
-name = "python-afl"
-optional = false
-python-versions = "*"
-version = "0.7.2"
-
-[metadata]
-content-hash = "fc4dfa7c4da7ef463d501e3a9c82a038616e032e6739fb81e7f679e1554ff61e"
-python-versions = "^3.6"
-
-[metadata.files]
-cython = [
-    {file = "Cython-0.29.15-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:1dc973bdea03c65f03f41517e4f0fc2b717d71cfbcf4ec34adac7e5bee71303e"},
-    {file = "Cython-0.29.15-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:214a53257c100e93e7673e95ab448d287a37626a3902e498025993cc633647ae"},
-    {file = "Cython-0.29.15-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:9a5f0cf8b95c0c058e413679a650f70dcc97764ccb2a6d5ccc6b08d44c9b334c"},
-    {file = "Cython-0.29.15-cp27-cp27m-win32.whl", hash = "sha256:61e505379497b624d6316dd67ef8100aaadca0451f48f8c6fff8d622281cd121"},
-    {file = "Cython-0.29.15-cp27-cp27m-win_amd64.whl", hash = "sha256:30462d61e7e290229a64e1c3682b4cc758ffc441e59cc6ce6fae059a05df305b"},
-    {file = "Cython-0.29.15-cp27-cp27mu-manylinux1_i686.whl", hash = "sha256:6f6de0bee19c70cb01e519634f0c35770de623006e4876e649ee4a960a147fec"},
-    {file = "Cython-0.29.15-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:c3d778304209cc39f8287da22f2180f34d2c2ee46cd55abd82e48178841b37b1"},
-    {file = "Cython-0.29.15-cp34-cp34m-manylinux1_i686.whl", hash = "sha256:34c888a57f419c63bef63bc0911c5bb407b93ed5d6bdeb1587dca2cd1dd56ad1"},
-    {file = "Cython-0.29.15-cp34-cp34m-manylinux1_x86_64.whl", hash = "sha256:ea3b61bff995de49b07331d1081e0056ea29901d3e995aa989073fe2b1be0cb7"},
-    {file = "Cython-0.29.15-cp34-cp34m-win32.whl", hash = "sha256:9f2839396d21d5537bc9ff53772d44db39b0efb6bf8b6cac709170483df53a5b"},
-    {file = "Cython-0.29.15-cp34-cp34m-win_amd64.whl", hash = "sha256:f91b16e73eca996f86d1943be3b2c2b679b03e068ed8c82a5506c1e65766e4a6"},
-    {file = "Cython-0.29.15-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:ea5f987b4da530822fa797cf2f010193be77ea9e232d07454e3194531edd8e58"},
-    {file = "Cython-0.29.15-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:34004f60b1e79033b0ca29b9ab53a86c12bcaab56648b82fbe21c007cd73d867"},
-    {file = "Cython-0.29.15-cp35-cp35m-win32.whl", hash = "sha256:d282b030ed5c736e4cdb1713a0c4fad7027f4e3959dc4b8fdb7c75042d83ed1b"},
-    {file = "Cython-0.29.15-cp35-cp35m-win_amd64.whl", hash = "sha256:bb6d90180eff72fc5a30099c442b8b0b5a620e84bf03ef32a55e3f7bd543f32e"},
-    {file = "Cython-0.29.15-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:b8ba4b4ee3addc26bc595a51b6240b05a80e254b946d624fff6506439bc323d1"},
-    {file = "Cython-0.29.15-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:77ac051b7caf02938a32ea0925f558534ab2a99c0c98c681cc905e3e8cba506e"},
-    {file = "Cython-0.29.15-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:d8c73fe0ec57a0e4fdf5d2728b5e18b63980f55f1baf51b6bac6a73e8cbb7186"},
-    {file = "Cython-0.29.15-cp36-cp36m-win32.whl", hash = "sha256:d114f9c0164df8fcd2880e4ba96986d7b0e7218f6984acc4989ff384c5d3d512"},
-    {file = "Cython-0.29.15-cp36-cp36m-win_amd64.whl", hash = "sha256:4e5acf3b856a50d0aaf385f06a7b56a128a296322a9740f5f279c96619244308"},
-    {file = "Cython-0.29.15-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:3dd0cba13b36ff969232930bd6db08d3da0798f1fac376bd1fa4458f4b55d802"},
-    {file = "Cython-0.29.15-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:c562bc316040097e21357e783286e5eca056a5b2750e89d9d75f9541c156b6dc"},
-    {file = "Cython-0.29.15-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:e7f1dcc0e8c3e18fa2fddca4aecdf71c5651555a8dc9a0cd3a1d164cbce6cb35"},
-    {file = "Cython-0.29.15-cp37-cp37m-win32.whl", hash = "sha256:7e4d74515d92c4e2be7201aaef7a51705bd3d5957df4994ddfe1b252195b5e27"},
-    {file = "Cython-0.29.15-cp37-cp37m-win_amd64.whl", hash = "sha256:0e078e793a9882bf48194b8b5c9b40c75769db1859cd90b210a4d7bf33cda2b1"},
-    {file = "Cython-0.29.15-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:01d566750e7c08e5f094419f8d1ee90e7fa286d8d77c4569748263ed5f05280a"},
-    {file = "Cython-0.29.15-cp38-cp38-manylinux1_i686.whl", hash = "sha256:1a3842be21d1e25b7f3440a0c881ef44161937273ea386c30c0e253e30c63740"},
-    {file = "Cython-0.29.15-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:072cb90e2fe4b5cc27d56de12ec5a00311eee781c2d2e3f7c98a82319103c7ed"},
-    {file = "Cython-0.29.15-cp38-cp38-win32.whl", hash = "sha256:993837bbf0849e3b176e1ef6a50e9b8c2225e895501b85d56f4bb65a67f5ea25"},
-    {file = "Cython-0.29.15-cp38-cp38-win_amd64.whl", hash = "sha256:e5c8f4198e25bc4b0e4a884377e0c0e46ca273993679e3bcc212ef96d4211b83"},
-    {file = "Cython-0.29.15-py2.py3-none-any.whl", hash = "sha256:7ea18a5c87cacdd6e4feacf8badf13643775b6f69c3aa8b50417834b9ce0e627"},
-    {file = "Cython-0.29.15.tar.gz", hash = "sha256:60d859e1efa5cc80436d58aecd3718ff2e74b987db0518376046adedba97ac30"},
-]
-python-afl = [
-    {file = "python-afl-0.7.2.tar.gz", hash = "sha256:deb47007655188757fdb880c7efcc58e53c346c469ba8755bc105bd8c6bbcc66"},
-]
diff --git a/fuzzing/pyproject.toml b/fuzzing/pyproject.toml
deleted file mode 100644
index cf63f9a4..00000000
--- a/fuzzing/pyproject.toml
+++ /dev/null
@@ -1,16 +0,0 @@
-[tool.poetry]
-name = "mutagen-fuzzing"
-version = "0.1.0"
-description = ""
-authors = ["Christoph Reiter <reiter.christoph@gmail.com>"]
-
-[tool.poetry.dependencies]
-python = "^3.6"
-cython = "^0.29.15"
-python-afl = "^0.7.2"
-
-[tool.poetry.dev-dependencies]
-
-[build-system]
-requires = ["poetry>=0.12"]
-build-backend = "poetry.masonry.api"
diff --git a/fuzzing/run.sh b/fuzzing/run.sh
index e7d721c2..17be3c2c 100755
--- a/fuzzing/run.sh
+++ b/fuzzing/run.sh
@@ -18,6 +18,6 @@ for i in `seq 2 $(nproc)`; do
     py-afl-fuzz -i "$EXAMPLES" -o "$RESULTS" -S "worker-$i"  -- $(which python) sut.py > /dev/null 2>&1 &
 done
 
-py-afl-fuzz -i "$EXAMPLES" -o "$RESULTS" -M "main" -- $(which python) sut.py # > /dev/null 2>&1 &
-#watch -n 1 -c afl-whatsup -s "$RESULTS"
+py-afl-fuzz -i "$EXAMPLES" -o "$RESULTS" -M "main" -- $(which python) sut.py > /dev/null 2>&1 &
+watch -n 1 -c afl-whatsup -s "$RESULTS"
 pkill afl-fuzz
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index b77469c5..7ab6729f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,6 +6,10 @@ authors = []
 
 [tool.poetry.dependencies]
 python = "^3.6"
+python-afl = {version = "^0.7.3", optional = true}
+
+[tool.poetry.extras]
+fuzzing-dev = ["python-afl"]
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.2"