diff --git a/Dockerfile.11 b/Dockerfile.11
index fc38d70..c8c0e98 100644
--- a/Dockerfile.11
+++ b/Dockerfile.11
@@ -80,9 +80,9 @@ RUN set -e; \
     "deb http://deb.debian.org/debian bullseye main contrib non-free" \
     "deb http://deb.debian.org/debian bullseye-updates main contrib non-free" \
     "deb http://security.debian.org/debian-security bullseye-security main contrib non-free" > /etc/apt/sources.list; \
-  apt update && apt install -yy bash locales apt-utils python3-tz; \
-  dpkg-reconfigure --frontend=noninteractive locales;update-locale LANG=$LANG; \
-  update-alternatives --install /bin/sh sh /bin/bash 1 
+  apt update && apt install -yy bash locales apt-utils; \
+  locale-gen $LANG && update-locale LANG=$LANG; \
+  update-alternatives --install /bin/sh sh /bin/bash 1
 
 ENV SHELL="/bin/bash"
 SHELL [ "/bin/bash", "-c" ]