diff --git a/11.0/Dockerfile b/11.0/Dockerfile
index 44d389c..6131128 100644
--- a/11.0/Dockerfile
+++ b/11.0/Dockerfile
@@ -25,6 +25,7 @@ RUN set -x; \
             python3-qrcode \
             python3-renderpm \
             python3-setuptools \
+            python3-slugify \
             python3-vobject \
             python3-watchdog \
             python3-xlrd \
diff --git a/12.0/Dockerfile b/12.0/Dockerfile
index acf092a..d180d6a 100644
--- a/12.0/Dockerfile
+++ b/12.0/Dockerfile
@@ -25,6 +25,7 @@ RUN set -x; \
             python3-qrcode \
             python3-renderpm \
             python3-setuptools \
+            python3-slugify \
             python3-vobject \
             python3-watchdog \
             python3-xlrd \
diff --git a/13.0/Dockerfile b/13.0/Dockerfile
index ec42aa6..8627f22 100644
--- a/13.0/Dockerfile
+++ b/13.0/Dockerfile
@@ -23,6 +23,7 @@ RUN set -x; \
             python3-qrcode \
             python3-renderpm \
             python3-setuptools \
+            python3-slugify \
             python3-vobject \
             python3-watchdog \
             python3-xlrd \