diff --git a/core/Dockerfile b/core/Dockerfile
index d5c8e1b4..751bd596 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -110,6 +110,7 @@ RUN <<-EOF
                 elasticsearch/elasticsearch:^8.7.0 \
                 jakub-onderka/openid-connect-php:^1.0.0 \
                 certmichelin/openid-connect-php:1.3.0 \
+                phpseclib/phpseclib:^3.0.47 \
                 aws/aws-sdk-php
         fi
 EOF