diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 7b621200..cd835565 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -16,6 +16,11 @@ jobs:
             build_image: "ghcr.io/wtsi-npg/ub-18.04-irods-clients-dev-4.2.11:latest"
             server_image: "ghcr.io/wtsi-npg/ub-18.04-irods-4.2.11:latest"
             experimental: false
+          # iRODS 4.2.12 clients on bionic
+          - irods: "4.2.12"
+            build_image: "ghcr.io/wtsi-npg/ub-18.04-irods-clients-dev-4.2.12:latest"
+            server_image: "ghcr.io/wtsi-npg/ub-18.04-irods-4.2.12:latest"
+            experimental: false
           # iRODS 4.3.0 clients on bionic
           - irods: "4.3.0"
             build_image: "ghcr.io/wtsi-npg/ub-18.04-irods-clients-dev-4.3.0:latest"
diff --git a/Dockerfile b/Dockerfile
index 4e3f15be..3622b37b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ ENV LANG=en_GB.UTF-8 \
     LANGUAGE=en_GB \
     LC_ALL=en_GB.UTF-8
 
-ENV IRODS_VERSION=4.2.11
+ENV IRODS_VERSION=4.2.12
 
 RUN curl -sSL https://packages.irods.org/irods-signing-key.asc | apt-key add - && \
     echo "deb [arch=amd64] https://packages.irods.org/apt/ $(lsb_release -sc) main" |\