diff --git a/Dockerfile b/Dockerfile
index 3771b61..d17aad0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,5 +9,5 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
       org.label-schema.vcs-url="https://github.com/zammad/zammad" \
       org.label-schema.vcs-type="Git" \
       org.label-schema.vendor="Zammad" \
-      org.label-schema.schema-version="1.0" \
+      org.label-schema.schema-version="1.2" \
       org.label-schema.docker.cmd="sysctl -w vm.max_map_count=262144;docker-compose up"
diff --git a/Dockerfile.elasticsearch b/Dockerfile.elasticsearch
index 0e8dc5d..c92e9c3 100644
--- a/Dockerfile.elasticsearch
+++ b/Dockerfile.elasticsearch
@@ -10,7 +10,7 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
       org.label-schema.vcs-url="https://github.com/zammad/zammad" \
       org.label-schema.vcs-type="Git" \
       org.label-schema.vendor="Zammad" \
-      org.label-schema.schema-version="1.0" \
+      org.label-schema.schema-version="1.2" \
       org.label-schema.docker.cmd="sysctl -w vm.max_map_count=262144;docker-compose up"
 
 RUN yes | /usr/share/elasticsearch/bin/elasticsearch-plugin install mapper-attachments
diff --git a/Dockerfile.nginx b/Dockerfile.nginx
index f5b5f95..e69df0a 100644
--- a/Dockerfile.nginx
+++ b/Dockerfile.nginx
@@ -10,7 +10,7 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
       org.label-schema.vcs-url="https://github.com/zammad/zammad" \
       org.label-schema.vcs-type="Git" \
       org.label-schema.vendor="Zammad" \
-      org.label-schema.schema-version="1.0" \
+      org.label-schema.schema-version="1.2" \
       org.label-schema.docker.cmd="sysctl -w vm.max_map_count=262144;docker-compose up"
 
 ADD nginx-zammad.conf /etc/nginx/conf.d/zammad.conf
diff --git a/Dockerfile.postgresql b/Dockerfile.postgresql
index c03a633..8d60cf1 100644
--- a/Dockerfile.postgresql
+++ b/Dockerfile.postgresql
@@ -10,6 +10,6 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
       org.label-schema.vcs-url="https://github.com/zammad/zammad" \
       org.label-schema.vcs-type="Git" \
       org.label-schema.vendor="Zammad" \
-      org.label-schema.schema-version="1.0" \
+      org.label-schema.schema-version="1.2" \
       org.label-schema.docker.cmd="sysctl -w vm.max_map_count=262144;docker-compose up"
 
diff --git a/Dockerfile.zammad b/Dockerfile.zammad
index a61dea1..fcb55d7 100644
--- a/Dockerfile.zammad
+++ b/Dockerfile.zammad
@@ -16,7 +16,7 @@ LABEL org.label-schema.build-date="$BUILD_DATE" \
       org.label-schema.vcs-url="https://github.com/zammad/zammad" \
       org.label-schema.vcs-type="Git" \
       org.label-schema.vendor="Zammad" \
-      org.label-schema.schema-version="1.0" \
+      org.label-schema.schema-version="1.2" \
       org.label-schema.docker.cmd="sysctl -w vm.max_map_count=262144;docker-compose up"
 
 # Expose ports