diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 8296ea2..6630044 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
 
     runs-on: ubuntu-latest
 
diff --git a/Dockerfile b/Dockerfile
index 3f4536f..2ca427c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.4-fpm
+FROM php:8.5-fpm
 
 LABEL maintainer="Kevin DeCapite"
 
diff --git a/README.md b/README.md
index d509bda..54ebd2c 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ This extension is tested with PHP versions:
 - 8.2
 - 8.3
 - 8.4
+- 8.5
 
 ## License
 `php-sweph` is work derived from the original release of the Astrodienst Swiss Ephemeris library.