diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2195d19..da151f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 ## [Unreleased]
 
 ### Fixed
+- [#56] PHPStan: configure `--memory-limit=512M` in the `phpstan` composer script to prevent
+  analysis from crashing under the default 128M limit on large codebases.
 - [#36] FutureStringArray: `await()` now copies `char*` elements into owned PHP strings via
   `FFI::string()` before releasing the future's memory. Previously, the method returned raw
   `FFI\CData` pointers that became dangling after `releaseMemory()`, causing use-after-free in
diff --git a/composer.json b/composer.json
index e42fce8..23bf2f5 100644
--- a/composer.json
+++ b/composer.json
@@ -36,7 +36,7 @@
     "scripts": {
         "lint": ["phpcs --standard=phpcs.xml.dist", "@rector", "@phpstan"],
         "lint:fix": ["@rector:fix", "phpcbf --standard=phpcs.xml.dist"],
-        "phpstan": "phpstan analyse",
+        "phpstan": "phpstan analyse --memory-limit=512M",
         "cs": "phpcs --standard=phpcs.xml.dist",
         "cs-fix": "phpcbf --standard=phpcs.xml.dist",
         "test": "phpunit",