diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b7a2779..c547537 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,7 +40,7 @@ jobs:
   pie-install:
     runs-on: ubuntu-24.04
     env:
-      PIE_VERSION: "1.4.8"
+      PIE_VERSION: "1.5.0"
 
     steps:
       - name: Install dependencies
diff --git a/README.md b/README.md
index 1db212c..0995e9a 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Of course PHP has to be installed too. The minimal version that is supported is
 
 #### PIE
 
-This extension can be installed with [PIE](https://github.com/php/pie), the modern
+This extension can be installed with [PIE](https://github.com/php/pie) 1.5.0 or later, the modern
 successor to PECL.
 
 ```
diff --git a/composer.json b/composer.json
index 3175618..faddb54 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,8 @@
         "docs": "https://www.php.net/manual/en/book.gnupg.php"
     },
     "require": {
-        "php": "^7.2 || ^8.0"
+        "php": "^7.2 || ^8.0",
+        "lib-gpgme": ">=1.3.0"
     },
     "php-ext": {
         "extension-name": "gnupg",