diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 20d4e93..bb4fab6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,6 +22,7 @@ jobs:
         varnish_version:
           - "7.5"
           - "7.6"
+          - "7.7"
 
     concurrency:
       group: ${{ github.ref_name != 'main' && format('{0}-{1}-{2}', github.workflow, github.ref, matrix.varnish_version) || github.sha }}
diff --git a/Dockerfile b/Dockerfile
index 591265b..b3b730b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG VARNISH_VERSION=7.6
+ARG VARNISH_VERSION=7.7
 FROM varnish:${VARNISH_VERSION}
 
 USER root
diff --git a/README.md b/README.md
index 75cf791..4566541 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ See the tests for more parameter edge cases.
 
 ## Building
 
-This module is primarily manually tested with Varnish 7.6, but also includes vtc tests for version 7.5.
+This module is primarily manually tested with Varnish 7.7, but also includes vtc tests for version 7.5 and 7.6.
 
 ```
 ./bootstrap
diff --git a/debug/Dockerfile b/debug/Dockerfile
index ca02b05..dc29ffe 100644
--- a/debug/Dockerfile
+++ b/debug/Dockerfile
@@ -1,4 +1,4 @@
-FROM varnish:7.6.1
+FROM varnish:7.7.1
 
 USER root