diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8738f695aae8e5a50cb53a3c5963d66db1fade41..7fcdc5a966ab3c0c11dfe28cf4243b45c3360ff8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -18,8 +18,5 @@ before_script:
     - make -C ${CI_JOB_NAME}
     - '[ "$CI_COMMIT_REF_NAME" != master ] || make -C ${CI_JOB_NAME} push'
 
-'15.1':
-  <<: *build_job
-
 '15.2':
   <<: *build_job
diff --git a/15.1/Dockerfile b/15.1/Dockerfile
deleted file mode 100644
index 0d3527f518b73c3b1bd004f887f9994c1f7e6843..0000000000000000000000000000000000000000
--- a/15.1/Dockerfile
+++ /dev/null
@@ -1,35 +0,0 @@
-FROM opensuse/leap:15.1
-
-RUN zypper refresh -f \
- && zypper update -y \
- && zypper clean
-
-RUN zypper --non-interactive install --no-recommends \
-  sudo wget curl which tar expect git \
-  make patch rpm-build rpmlint \
- && zypper clean
-
-RUN zypper --non-interactive install --no-recommends \
-  cmake libopenssl-devel ccache \
- && zypper clean
-
-RUN OBS_DIST=openSUSE_Leap_15.1 \
- && zypper --non-interactive addrepo --refresh https://download.opensuse.org/repositories/home:/lazyfrosch:/devel:/tools/"${OBS_DIST}"/home:lazyfrosch:devel:tools.repo \
- && zypper --gpg-auto-import-keys --non-interactive install spectool createrepo \
- && zypper clean -a
-
-RUN rpm --import https://packages.icinga.com/icinga.key \
- && zypper --non-interactive addrepo --refresh https://packages.icinga.com/openSUSE/ICINGA-release.repo \
- && zypper --non-interactive refresh \
- && zypper clean -a
-
-RUN groupadd -g 1000 build \
- && useradd -u 1000 -g 1000 -m build \
- && echo 'Defaults:build !requiretty' | tee -a /etc/sudoers \
- && echo 'build ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers \
- && chown build.build /usr/local/bin
-
-USER build
-RUN git clone https://git.icinga.com/build-docker/scripts.git /usr/local/bin
-ENTRYPOINT ["/usr/local/bin/icinga-build-entrypoint"]
-CMD ["icinga-build-package"]
diff --git a/15.1/Makefile b/15.1/Makefile
deleted file mode 100644
index f451fe153997996b75db9be5b1b9b967fad97fc4..0000000000000000000000000000000000000000
--- a/15.1/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-VARIANT := x86_64
-include ../image.mk
diff --git a/Makefile b/Makefile
index aaaa640a7fd6868644186f816f6a5b250082a141..55caed7bce668c9898dbc98dc9d1c86dd2b070d8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,5 @@
 all:
-	$(MAKE) -C 15.1
 	$(MAKE) -C 15.2
 
 push:
-	$(MAKE) -C 15.1 push
 	$(MAKE) -C 15.2 push