diff --git a/config/ext.json b/config/ext.json
index 5a29d583..7e4718e9 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -35,6 +35,10 @@
             "zlib"
         ]
     },
+    "apcu": {
+        "type": "external",
+        "source": "apcu"
+    },
     "event": {
         "type": "external",
         "source": "ext-event",
diff --git a/config/source.json b/config/source.json
index e37039fe..0b72e00d 100644
--- a/config/source.json
+++ b/config/source.json
@@ -209,6 +209,16 @@
             "path": "LICENSE"
         }
     },
+    "apcu": {
+        "type": "url",
+        "url": "http://pecl.php.net/get/APCu",
+        "path": "php-src/ext/apcu",
+        "filename": "apcu.tgz",
+        "license": {
+            "type": "file",
+            "path": "LICENSE"
+        }
+    },
     "mcrypt": {
         "type": "url",
         "url": "https://jaist.dl.sourceforge.net/project/mcrypt/MCrypt/2.6.8/mcrypt-2.6.8.tar.gz",
diff --git a/ext-support.md b/ext-support.md
index 05268440..fa759d30 100644
--- a/ext-support.md
+++ b/ext-support.md
@@ -8,6 +8,7 @@
 
 |            | Linux                                                               | macOS                                                          | Windows |
 |------------|---------------------------------------------------------------------|----------------------------------------------------------------|---------|
+| apcu       | yes                                                                 | yes                                                            |         |
 | bcmath     | yes                                                                 | yes                                                            |         |
 | bz2        | yes                                                                 | yes                                                            |         |
 | calendar   | yes                                                                 | yes                                                            |         |