diff --git a/.dockerignore b/.dockerignore
index 25d334d6d..f51c422df 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -3,6 +3,7 @@
 /*
 !/composer.*
 !/config/
+!/external/
 !/src/
 !/vendor/
 !/webroot/
diff --git a/Dockerfile b/Dockerfile
index 80e675403..5e7e2fee6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -40,6 +40,7 @@ RUN composer install $COMPOSER_FLAGS --no-scripts --no-autoloader
 
 # copy rest of the project. copy in order that is least to most changed
 COPY --from=source /app/webroot ./webroot
+COPY --from=source /app/external ./external
 COPY --from=source /app/src ./src
 COPY --from=source /app/config ./config