diff --git a/.cirrus.yml b/.cirrus.yml
index 3dc4b8548a..b46bc5ffd5 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -251,6 +251,14 @@ opensuse_leap_15_5_task:
     dockerfile: ci/opensuse-leap-15.5/Dockerfile
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
+  << : *SKIP_TASK_ON_PR
+
+opensuse_leap_15_6_task:
+  container:
+    # Opensuse Leap 15.6 EOL: ~Dec 2025
+    dockerfile: ci/opensuse-leap-15.6/Dockerfile
+    << : *RESOURCES_TEMPLATE
+  << : *CI_TEMPLATE
 
 opensuse_tumbleweed_task:
   container:
diff --git a/CHANGES b/CHANGES
index 3f34a63c54..0030bcdc26 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+7.0.0-dev.121 | 2024-04-17 09:20:53 -0700
+
+  * Add Opensuse leap 15.6 to CI (Johanna Amann, Corelight)
+
 7.0.0-dev.119 | 2024-04-15 17:52:44 +0200
 
   * Bump Spicy. (Robin Sommer, Corelight)
diff --git a/VERSION b/VERSION
index aec4efd5d7..8713b63c8c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.0.0-dev.119
+7.0.0-dev.121
diff --git a/ci/opensuse-leap-15.6/Dockerfile b/ci/opensuse-leap-15.6/Dockerfile
new file mode 100644
index 0000000000..af753098de
--- /dev/null
+++ b/ci/opensuse-leap-15.6/Dockerfile
@@ -0,0 +1,39 @@
+FROM opensuse/leap:15.6
+
+# A version field to invalidate Cirrus's build cache when needed, as suggested in
+# https://github.com/cirruslabs/cirrus-ci-docs/issues/544#issuecomment-566066822
+ENV DOCKERFILE_VERSION 20230905
+
+RUN zypper addrepo https://download.opensuse.org/repositories/openSUSE:Leap:15.6:Update/standard/openSUSE:Leap:15.6:Update.repo \
+ && zypper refresh \
+ && zypper in -y \
+    bison \
+    ccache \
+    cmake \
+    curl \
+    flex \
+    gcc12 \
+    gcc12-c++ \
+    git \
+    gzip \
+    libopenssl-devel \
+    libpcap-devel \
+    make \
+    openssh \
+    python312 \
+    python312-devel \
+    python312-pip \
+    swig \
+    tar \
+    which \
+    zlib-devel \
+  && rm -rf /var/cache/zypp
+
+RUN update-alternatives --install /usr/bin/pip3 pip3 /usr/bin/pip3.12 100
+RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 100
+RUN update-alternatives --install /usr/bin/python3-config python3-config /usr/bin/python3.12-config 100
+
+RUN pip3 install websockets junit2html
+
+RUN update-alternatives --install /usr/bin/cc cc /usr/bin/gcc-12 100
+RUN update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++-12 100