diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 21f8872..0c3ed52 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -23,6 +23,7 @@ jobs:
           - 8.1snapshot
           - 8.2snapshot
           - 8.3snapshot
+          - 8.4snapshot
         zts: [on, off]
         opcache: [on, off]
     steps:
diff --git a/Dockerfile b/Dockerfile
index 0a28bcd..566ef34 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
-FROM php:8.3-alpine
+FROM php:8.4-alpine
 
 RUN apk add --no-cache $PHPIZE_DEPS valgrind
 
-COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
\ No newline at end of file
+COPY --from=composer:latest /usr/bin/composer /usr/local/bin/composer
diff --git a/appveyor.yml b/appveyor.yml
index aba4f10..3b03633 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,22 +14,22 @@ environment:
   matrix:
     - ARCH: x86
       INT_SIZE: 32
-      PHP_VER: 8.3
+      PHP_VER: 8.4
       VC_VER: vc15
       ZTS: --enable-zts
     - ARCH: x64
       INT_SIZE: 64
-      PHP_VER: 8.3
+      PHP_VER: 8.4
       VC_VER: vc15
       ZTS: --enable-zts
     - ARCH: x86
       INT_SIZE: 32
-      PHP_VER: 8.3
+      PHP_VER: 8.4
       VC_VER: vc15
       ZTS: --disable-zts
     - ARCH: x64
       INT_SIZE: 64
-      PHP_VER: 8.3
+      PHP_VER: 8.4
       VC_VER: vc15
       ZTS: --disable-zts