diff --git a/docker/studip/Dockerfile b/docker/studip/Dockerfile
index 92eb5b533652e8ba97fa64d08891ef10612f5efa..daa52e6e8c8facf26eb2437868d487d74e3b69f0 100644
--- a/docker/studip/Dockerfile
+++ b/docker/studip/Dockerfile
@@ -18,6 +18,7 @@ RUN apt update && apt install -y --no-install-recommends \
 
 # Install locales
 RUN sed -i -e 's/# en_GB.UTF-8 UTF-8/en_GB.UTF-8 UTF-8/' /etc/locale.gen \
+    && sed -i -e 's/# de_DE.UTF-8 UTF-8/de_DE.UTF-8 UTF-8/' /etc/locale.gen \
     && dpkg-reconfigure --frontend=noninteractive locales \
     && update-locale
 
diff --git a/docker/studip/Dockerfile-Dev b/docker/studip/Dockerfile-Dev
index 3c2b2c5b2230a6242af0d1da3d899bbc9f971af1..28e112bfd97b7a47400e5763c8ce900d1546b6cc 100644
--- a/docker/studip/Dockerfile-Dev
+++ b/docker/studip/Dockerfile-Dev
@@ -18,6 +18,7 @@ RUN apt update && apt install -y --no-install-recommends \
 
 # Install locales
 RUN sed -i -e 's/# en_GB.UTF-8 UTF-8/en_GB.UTF-8 UTF-8/' /etc/locale.gen \
+    && sed -i -e 's/# de_DE.UTF-8 UTF-8/de_DE.UTF-8 UTF-8/' /etc/locale.gen \
     && dpkg-reconfigure --frontend=noninteractive locales \
     && update-locale