diff --git a/composer.json b/composer.json
index badab3e6b..ca80c7b7d 100644
--- a/composer.json
+++ b/composer.json
@@ -60,7 +60,8 @@
         "symfony/process": "3.4.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.5"
+        "phpunit/phpunit": "^7.5",
+        "ext-bcmath": "*"
     },
     "config": {
         "platform": {
diff --git a/composer.lock b/composer.lock
index e4def70ed..871fde6e9 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8af1f24b91068bfac1ba46b2a0fd55f8",
+    "content-hash": "88004e078d1368f9e85eeab4a67e2253",
     "packages": [
         {
             "name": "composer/ca-bundle",
@@ -2430,7 +2430,9 @@
         "ext-json": "*",
         "ext-libxml": "*"
     },
-    "platform-dev": [],
+    "platform-dev": {
+        "ext-bcmath": "*"
+    },
     "platform-overrides": {
         "php": "7.1.3"
     }