diff --git a/root/tmp/setup/php-extensions.sh b/root/tmp/setup/php-extensions.sh
index 6975f54..ce24a7a 100755
--- a/root/tmp/setup/php-extensions.sh
+++ b/root/tmp/setup/php-extensions.sh
@@ -45,6 +45,7 @@ docker-php-ext-install -j$(nproc) \
     intl \
     mysqli \
     opcache \
+    pcntl \
     pgsql \
     soap \
     xsl