diff --git a/Dockerfile-15 b/Dockerfile-15
index 5ef571c51..e8dd95c72 100644
--- a/Dockerfile-15
+++ b/Dockerfile-15
@@ -216,8 +216,6 @@ RUN echo "C.UTF-8 UTF-8" > /etc/locale.gen && echo "en_US.UTF-8 UTF-8" >> /etc/l
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
-ENV LC_CTYPE=C.UTF-8
-ENV LC_COLLATE=C.UTF-8
 ENV LOCALE_ARCHIVE /usr/lib/locale/locale-archive
 RUN mkdir -p /usr/share/postgresql/extension/ && \
     ln -s /usr/lib/postgresql/bin/pgsodium_getkey.sh /usr/share/postgresql/extension/pgsodium_getkey && \
diff --git a/Dockerfile-17 b/Dockerfile-17
index fe8f96c2d..e83a273d4 100644
--- a/Dockerfile-17
+++ b/Dockerfile-17
@@ -225,8 +225,6 @@ RUN echo "C.UTF-8 UTF-8" > /etc/locale.gen && echo "en_US.UTF-8 UTF-8" >> /etc/l
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
-ENV LC_CTYPE=C.UTF-8
-ENV LC_COLLATE=C.UTF-8
 ENV LOCALE_ARCHIVE /usr/lib/locale/locale-archive
 RUN mkdir -p /usr/share/postgresql/extension/ && \
     ln -s /usr/lib/postgresql/bin/pgsodium_getkey.sh /usr/share/postgresql/extension/pgsodium_getkey && \
diff --git a/Dockerfile-orioledb-17 b/Dockerfile-orioledb-17
index 7c981177b..bd36e6fd0 100644
--- a/Dockerfile-orioledb-17
+++ b/Dockerfile-orioledb-17
@@ -230,8 +230,6 @@ RUN echo "C.UTF-8 UTF-8" > /etc/locale.gen && echo "en_US.UTF-8 UTF-8" >> /etc/l
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
-ENV LC_CTYPE=C.UTF-8
-ENV LC_COLLATE=C.UTF-8
 ENV LOCALE_ARCHIVE /usr/lib/locale/locale-archive
 RUN mkdir -p /usr/share/postgresql/extension/ && \
     ln -s /usr/lib/postgresql/bin/pgsodium_getkey.sh /usr/share/postgresql/extension/pgsodium_getkey && \