diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index e0f75e18..7cd6c58d 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -208,6 +208,10 @@ jobs:
 
   conformance-suite:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ssp-version: ["v2.3.7", "v2.4.2"]
     env:
       SUITE_BASE_URL: https://localhost.emobix.co.uk:8443
       VERSION: release-v5.1.35
@@ -240,7 +244,7 @@ jobs:
         working-directory: ./main
         # Must run after conformance suite since they share a docker network.
         run: |
-          OIDC_VERSION=@dev docker compose -f docker/docker-compose.yml --project-directory . up -d --build
+          SSP_VERSION=${{ matrix.ssp-version }} OIDC_VERSION=@dev docker compose -f docker/docker-compose.yml --project-directory . up -d --build
           sleep 30
         # while ! curl -skfail https://op.local.stack-dev.cirrusidentity.com/.well-known/openid-configuration >/dev/null; do sleep 2; done
       - name: Run Basic conformance tests
diff --git a/README.md b/README.md
index e68c6775..74bfc281 100644
--- a/README.md
+++ b/README.md
@@ -39,13 +39,13 @@ during module development. SimpleSAMLphp has followed semantic versioning for it
 for example, that v5.* of the OIDC module should work with any v2.* of SimpleSAMLphp. However, please note that
 PHP version requirements have changed in minor SimpleSAMLphp releases.
 
-| OIDC module | Tested SimpleSAMLphp |  PHP   | Note                        |
-|:------------|:---------------------|:------:|-----------------------------|
-| v6.\*       | v2.3.\*              | \>=8.2 | Recommended                 |
-| v5.\*       | v2.1.\*              | \>=8.1 |                             |
-| v4.\*       | v2.0.\*              | \>=8.0 |                             |
-| v3.\*       | v2.0.\*              | \>=7.4 | Abandoned from August 2023. |
-| v2.\*       | v1.19.\*             | \>=7.4 |                             |
+| OIDC module | Tested SimpleSAMLphp |  PHP   | Note        |
+|:------------|:---------------------|:------:|-------------|
+| v6.\*       | v2.3.\*, v2.4.\*     | \>=8.2 | Recommended |
+| v5.\*       | v2.1.\*              | \>=8.1 |             |
+| v4.\*       | v2.0.\*              | \>=8.0 |             |
+| v3.\*       | v2.0.\*              | \>=7.4 |             |
+| v2.\*       | v1.19.\*             | \>=7.4 |             |
 
 ### Upgrading?
 
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6bd877ea..0f85fc86 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,5 +1,6 @@
-FROM cirrusid/simplesamlphp:v2.3.7
-#FROM cicnavi/simplesamlphp:dev
+ARG SSP_VERSION="v2.4.2"
+FROM cirrusid/simplesamlphp:${SSP_VERSION}
+#FROM cicnavi/simplesamlphp:${SSP_VERSION}
 
 RUN apt-get update && apt-get install -y sqlite3
 # Prepopulate the DB with items needed for testing
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 9511baad..83bb8fa3 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -16,6 +16,7 @@ services:
       context: .
       dockerfile: docker/Dockerfile
       args:
+        SSP_VERSION: "${SSP_VERSION}"
         OIDC_VERSION: "${OIDC_VERSION}"
     environment:
       - STAGINGCOMPOSERREPOS=oidc