diff --git a/Dockerfile.3.6.in b/Dockerfile.3.6.in
index 6486da4bfea5b00f1503bbf4630a2956379e70ff..7ba5502f89c0a9b3fa012479c33f76a250153b14 100644
--- a/Dockerfile.3.6.in
+++ b/Dockerfile.3.6.in
@@ -1 +1 @@
-RUN pip install -U black==19.3b0
+RUN pip install -U black==20.8b1
diff --git a/Dockerfile.3.7.in b/Dockerfile.3.7.in
index 6486da4bfea5b00f1503bbf4630a2956379e70ff..7ba5502f89c0a9b3fa012479c33f76a250153b14 100644
--- a/Dockerfile.3.7.in
+++ b/Dockerfile.3.7.in
@@ -1 +1 @@
-RUN pip install -U black==19.3b0
+RUN pip install -U black==20.8b1
diff --git a/Dockerfile.3.8.in b/Dockerfile.3.8.in
index 6486da4bfea5b00f1503bbf4630a2956379e70ff..7ba5502f89c0a9b3fa012479c33f76a250153b14 100644
--- a/Dockerfile.3.8.in
+++ b/Dockerfile.3.8.in
@@ -1 +1 @@
-RUN pip install -U black==19.3b0
+RUN pip install -U black==20.8b1
diff --git a/Dockerfile.3.9-rc.in b/Dockerfile.3.9-rc.in
index 6486da4bfea5b00f1503bbf4630a2956379e70ff..7ba5502f89c0a9b3fa012479c33f76a250153b14 100644
--- a/Dockerfile.3.9-rc.in
+++ b/Dockerfile.3.9-rc.in
@@ -1 +1 @@
-RUN pip install -U black==19.3b0
+RUN pip install -U black==20.8b1
diff --git a/Dockerfile.alpine.in b/Dockerfile.alpine.in
index ff5b95a66fead24cad356855710f5137c3cd5108..6f641d381c4d65670116680a1ff65a021b9aa42f 100644
--- a/Dockerfile.alpine.in
+++ b/Dockerfile.alpine.in
@@ -10,5 +10,5 @@ RUN apk add --virtual .build-deps \
     openldap-dev libsass g++ postgresql-client bash \
     libffi-dev
 
-RUN pip install 'flake8-bugbear~=19.8' pipenv tox twine wheel 'xoutil~=2.1' merchise.lint>=0.16 sphinx sphinx-rtd-theme 'python-gitlab~=1.15'
+RUN pip install 'flake8-bugbear~=20.1' pipenv tox twine wheel 'xoutil~=2.1' merchise.lint>=0.16 sphinx sphinx-rtd-theme 'python-gitlab~=1.15'
 RUN pip install git+https://github.com/pycqa/pyflakes@4ed1ba41d1406dbb6c9ffbd369c2f523c2dc48f3
diff --git a/Dockerfile.debian.in b/Dockerfile.debian.in
index e67faa039157b765036517f99edb442f8a440a79..2d797cfeeb1d148325ba579273c178fdd8ade38c 100644
--- a/Dockerfile.debian.in
+++ b/Dockerfile.debian.in
@@ -4,5 +4,5 @@ LABEL maintainer="Merchise Autrement <info@merchise.org>"
 RUN echo 20200515 && apt-get update && \
     apt-get install -y --no-install-recommends build-essential git make gnupg
 
-RUN pip install 'flake8-bugbear~=19.8' pipenv tox twine wheel 'xoutil~=2.1' merchise.lint>=0.16 sphinx sphinx-rtd-theme 'python-gitlab~=1.15'
+RUN pip install 'flake8-bugbear~=20.1' pipenv tox twine wheel 'xoutil~=2.1' merchise.lint>=0.16 sphinx sphinx-rtd-theme 'python-gitlab~=1.15'
 RUN pip install git+https://github.com/pycqa/pyflakes@4ed1ba41d1406dbb6c9ffbd369c2f523c2dc48f3