diff --git a/jitsi_admin_application_dockerfile b/jitsi_admin_application_dockerfile
index a7369d7..6fd965c 100644
--- a/jitsi_admin_application_dockerfile
+++ b/jitsi_admin_application_dockerfile
@@ -28,6 +28,7 @@ RUN apk --no-cache add \
     php83-pcntl \
     php83-posix \
     php83-sockets \
+    php83-bcmath \
     && rm -rf /var/cache/apk/*
 
 RUN echo "Europe/Berlin" > /etc/timezone