diff --git a/Dockerfile b/Dockerfile
index 8334b9e3..0ebbebe0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -133,7 +133,7 @@ RUN pip3 install --no-cache-dir pipenv \
 ########################
 # Install Python Black #
 ########################
-    && wget --tries=5 -q -O /usr/local/bin/black https://github.com/psf/black/releases/download/21.7b0/black_linux \
+    && wget --tries=5 -q -O /usr/local/bin/black https://github.com/psf/black/releases/download/21.9b0/black_linux \
     && chmod +x /usr/local/bin/black
 ##############################
 # Installs Perl dependencies #
diff --git a/Dockerfile-slim b/Dockerfile-slim
index d4c8332d..b5e16d46 100644
--- a/Dockerfile-slim
+++ b/Dockerfile-slim
@@ -108,7 +108,7 @@ RUN curl --retry 5 --retry-delay 5 -sL https://cpanmin.us/ | perl - -nq --no-wge
 ########################
 # Install Python Black #
 ########################
-    && wget --tries=5 -q -O /usr/local/bin/black https://github.com/psf/black/releases/download/21.7b0/black_linux \
+    && wget --tries=5 -q -O /usr/local/bin/black https://github.com/psf/black/releases/download/21.9b0/black_linux \
     && chmod +x /usr/local/bin/black \
 #######################
 # Installs ActionLint #