diff --git a/README.md b/README.md
index 8690117..0b14629 100644
--- a/README.md
+++ b/README.md
@@ -62,6 +62,10 @@ Until version 0.4, this action always used the latest [fedora-python-tox](https:
 image. Since version 34.0, the first number in the version (also sometimes
 referred to as the "major version") represents the release of Fedora used in the image.
 
+### v39.0
+
+* Uses Fedora 39 as the base container image.
+
 ### v38.0
 
 * Uses Fedora 38 as the base container image.
diff --git a/action.yaml b/action.yaml
index 73b661a..1ae0f5a 100644
--- a/action.yaml
+++ b/action.yaml
@@ -16,7 +16,7 @@ inputs:
 
 runs:
   using: docker
-  image: docker://fedorapython/fedora-python-tox:f38
+  image: docker://fedorapython/fedora-python-tox:f39
   env:
     TOXENV: ${{ inputs.tox_env }}
     DNF_INSTALL: ${{ inputs.dnf_install }}